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commit 8e54caf407b98efa05409e1fee0e5381abd2b088 upstream.
Some Atmel TPMs provide completely wrong timeouts from their
TPM_CAP_PROP_TIS_TIMEOUT query. This patch detects that and returns
new correct values via a DID/VID table in the TIS driver.
Tested on ARM using an AT97SC3204T FW version 37.16
[PHuewe: without this fix these 'broken' Atmel TPMs won't function on
older kernels]
Signed-off-by: "Berg, Christopher" <Christopher.Berg@atmel.com>
Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
[bwh: Backported to 3.10:
- Adjust filename, context
- s/chip->ops->/chip->vendor./]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bcc05910359183b431da92713e98eed478edf83a upstream.
If scsi_remove_host() is invoked after a SCSI device has been blocked,
if the fast_io_fail_tmo or dev_loss_tmo work gets scheduled on the
workqueue executing srp_remove_work() and if an I/O request is
scheduled after the SCSI device had been blocked by e.g. multipathd
then the following deadlock can occur:
kworker/6:1 D ffff880831f3c460 0 195 2 0x00000000
Call Trace:
[<ffffffff814aafd9>] schedule+0x29/0x70
[<ffffffff814aa0ef>] schedule_timeout+0x10f/0x2a0
[<ffffffff8105af6f>] msleep+0x2f/0x40
[<ffffffff8123b0ae>] __blk_drain_queue+0x4e/0x180
[<ffffffff8123d2d5>] blk_cleanup_queue+0x225/0x230
[<ffffffffa0010732>] __scsi_remove_device+0x62/0xe0 [scsi_mod]
[<ffffffffa000ed2f>] scsi_forget_host+0x6f/0x80 [scsi_mod]
[<ffffffffa0002eba>] scsi_remove_host+0x7a/0x130 [scsi_mod]
[<ffffffffa07cf5c5>] srp_remove_work+0x95/0x180 [ib_srp]
[<ffffffff8106d7aa>] process_one_work+0x1ea/0x6c0
[<ffffffff8106dd9b>] worker_thread+0x11b/0x3a0
[<ffffffff810758bd>] kthread+0xed/0x110
[<ffffffff814b972c>] ret_from_fork+0x7c/0xb0
multipathd D ffff880096acc460 0 5340 1 0x00000000
Call Trace:
[<ffffffff814aafd9>] schedule+0x29/0x70
[<ffffffff814aa0ef>] schedule_timeout+0x10f/0x2a0
[<ffffffff814ab79b>] io_schedule_timeout+0x9b/0xf0
[<ffffffff814abe1c>] wait_for_completion_io_timeout+0xdc/0x110
[<ffffffff81244b9b>] blk_execute_rq+0x9b/0x100
[<ffffffff8124f665>] sg_io+0x1a5/0x450
[<ffffffff8124fd21>] scsi_cmd_ioctl+0x2a1/0x430
[<ffffffff8124fef2>] scsi_cmd_blk_ioctl+0x42/0x50
[<ffffffffa00ec97e>] sd_ioctl+0xbe/0x140 [sd_mod]
[<ffffffff8124bd04>] blkdev_ioctl+0x234/0x840
[<ffffffff811cb491>] block_ioctl+0x41/0x50
[<ffffffff811a0df0>] do_vfs_ioctl+0x300/0x520
[<ffffffff811a1051>] SyS_ioctl+0x41/0x80
[<ffffffff814b9962>] tracesys+0xd0/0xd5
Fix this by scheduling removal work on another workqueue than the
transport layer timers.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Reviewed-by: David Dillow <dave@thedillows.org>
Cc: Sebastian Parschauer <sebastian.riemer@profitbricks.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 40ddbf5069bd4e11447c0088fc75318e0aac53f0 upstream.
commit 65b97cf6b8de introduced in v3.7 caused a regression
by using a reversed CS_MASK thus causing omap_calculate_ecc to
always fail. As the NAND base driver never checks for .calculate()'s
return value, the zeroed ECC values are used as is without showing
any error to the user. However, this won't work and the NAND device
won't be guarded by any error code.
Fix the issue by using the correct mask.
Code was tested on omap3beagle using the following procedure
- flash the primary bootloader (MLO) from the kernel to the first
NAND partition using nandwrite.
- boot the board from NAND. This utilizes OMAP ROM loader that
relies on 1-bit Hamming code ECC.
Fixes: 65b97cf6b8de (mtd: nand: omap2: handle nand on gpmc)
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a152056c912db82860a8b4c23d0bd3a5aa89e363 upstream.
I got the following panic on my fsl p5020ds board.
Unable to handle kernel paging request for data at address 0x7375627379737465
Faulting instruction address: 0xc000000000100778
Oops: Kernel access of bad area, sig: 11 [#1]
SMP NR_CPUS=24 CoreNet Generic
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.15.0-next-20140613 #145
task: c0000000fe080000 ti: c0000000fe088000 task.ti: c0000000fe088000
NIP: c000000000100778 LR: c00000000010073c CTR: 0000000000000000
REGS: c0000000fe08aa00 TRAP: 0300 Not tainted (3.15.0-next-20140613)
MSR: 0000000080029000 <CE,EE,ME> CR: 24ad2e24 XER: 00000000
DEAR: 7375627379737465 ESR: 0000000000000000 SOFTE: 1
GPR00: c0000000000c99b0 c0000000fe08ac80 c0000000009598e0 c0000000fe001d80
GPR04: 00000000000000d0 0000000000000913 c000000007902b20 0000000000000000
GPR08: c0000000feaae888 0000000000000000 0000000007091000 0000000000200200
GPR12: 0000000028ad2e28 c00000000fff4000 c0000000007abe08 0000000000000000
GPR16: c0000000007ab160 c0000000007aaf98 c00000000060ba68 c0000000007abda8
GPR20: c0000000007abde8 c0000000feaea6f8 c0000000feaea708 c0000000007abd10
GPR24: c000000000989370 c0000000008c6228 00000000000041ed c0000000fe00a400
GPR28: c00000000017c1cc 00000000000000d0 7375627379737465 c0000000fe001d80
NIP [c000000000100778] .__kmalloc_track_caller+0x70/0x168
LR [c00000000010073c] .__kmalloc_track_caller+0x34/0x168
Call Trace:
[c0000000fe08ac80] [c00000000087e6b8] uevent_sock_list+0x0/0x10 (unreliable)
[c0000000fe08ad20] [c0000000000c99b0] .kstrdup+0x44/0x90
[c0000000fe08adc0] [c00000000017c1cc] .__kernfs_new_node+0x4c/0x130
[c0000000fe08ae70] [c00000000017d7e4] .kernfs_new_node+0x2c/0x64
[c0000000fe08aef0] [c00000000017db00] .kernfs_create_dir_ns+0x34/0xc8
[c0000000fe08af80] [c00000000018067c] .sysfs_create_dir_ns+0x58/0xcc
[c0000000fe08b010] [c0000000002c711c] .kobject_add_internal+0xc8/0x384
[c0000000fe08b0b0] [c0000000002c7644] .kobject_add+0x64/0xc8
[c0000000fe08b140] [c000000000355ebc] .device_add+0x11c/0x654
[c0000000fe08b200] [c0000000002b5988] .add_disk+0x20c/0x4b4
[c0000000fe08b2c0] [c0000000003a21d4] .add_mtd_blktrans_dev+0x340/0x514
[c0000000fe08b350] [c0000000003a3410] .mtdblock_add_mtd+0x74/0xb4
[c0000000fe08b3e0] [c0000000003a32cc] .blktrans_notify_add+0x64/0x94
[c0000000fe08b470] [c00000000039b5b4] .add_mtd_device+0x1d4/0x368
[c0000000fe08b520] [c00000000039b830] .mtd_device_parse_register+0xe8/0x104
[c0000000fe08b5c0] [c0000000003b8408] .of_flash_probe+0x72c/0x734
[c0000000fe08b750] [c00000000035ba40] .platform_drv_probe+0x38/0x84
[c0000000fe08b7d0] [c0000000003599a4] .really_probe+0xa4/0x29c
[c0000000fe08b870] [c000000000359d3c] .__driver_attach+0x100/0x104
[c0000000fe08b900] [c00000000035746c] .bus_for_each_dev+0x84/0xe4
[c0000000fe08b9a0] [c0000000003593c0] .driver_attach+0x24/0x38
[c0000000fe08ba10] [c000000000358f24] .bus_add_driver+0x1c8/0x2ac
[c0000000fe08bab0] [c00000000035a3a4] .driver_register+0x8c/0x158
[c0000000fe08bb30] [c00000000035b9f4] .__platform_driver_register+0x6c/0x80
[c0000000fe08bba0] [c00000000084e080] .of_flash_driver_init+0x1c/0x30
[c0000000fe08bc10] [c000000000001864] .do_one_initcall+0xbc/0x238
[c0000000fe08bd00] [c00000000082cdc0] .kernel_init_freeable+0x188/0x268
[c0000000fe08bdb0] [c0000000000020a0] .kernel_init+0x1c/0xf7c
[c0000000fe08be30] [c000000000000884] .ret_from_kernel_thread+0x58/0xd4
Instruction dump:
41bd0010 480000c8 4bf04eb5 60000000 e94d0028 e93f0000 7cc95214 e8a60008
7fc9502a 2fbe0000 419e00c8 e93f0022 <7f7e482a> 39200000 88ed06b2 992d06b2
---[ end trace b4c9a94804a42d40 ]---
It seems that the corrupted partition header on my mtd device triggers
a bug in the ftl. In function build_maps() it will allocate the buffers
needed by the mtd partition, but if something goes wrong such as kmalloc
failure, mtd read error or invalid partition header parameter, it will
free all allocated buffers and then return non-zero. In my case, it
seems that partition header parameter 'NumTransferUnits' is invalid.
And the ftl_freepart() is a function which free all the partition
buffers allocated by build_maps(). Given the build_maps() is a self
cleaning function, so there is no need to invoke this function even
if build_maps() return with error. Otherwise it will causes the
buffers to be freed twice and then weird things would happen.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2446dba03f9dabe0b477a126cbeb377854785b47 upstream.
Currently we don't abort recovery on a write error if the write error
to the recovering device was triggerd by normal IO (as opposed to
recovery IO).
This means that for one bitmap region, the recovery might write to the
recovering device for a few sectors, then not bother for subsequent
sectors (as it never writes to failed devices). In this case
the bitmap bit will be cleared, but it really shouldn't.
The result is that if the recovering device fails and is then re-added
(after fixing whatever hardware problem triggerred the failure),
the second recovery won't redo the region it was in the middle of,
so some of the device will not be recovered properly.
If we abort the recovery, the region being processes will be cancelled
(bit not cleared) and the whole region will be retried.
As the bug can result in data corruption the patch is suitable for
-stable. For kernels prior to 3.11 there is a conflict in raid10.c
which will require care.
Original-from: jiao hui <jiaohui@bwstor.com.cn>
Reported-and-tested-by: jiao hui <jiaohui@bwstor.com.cn>
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2f0304d21867476394cd51a54e97f7273d112261 upstream.
If the user creates a listening cm_id with backlog of 0 the IWCM ends
up not allowing any connection requests at all. The correct behavior
is for the IWCM to pick a default value if the user backlog parameter
is zero.
Lustre from version 1.8.8 onward uses a backlog of 0, which breaks
iwarp support without this fix.
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b39685526f46976bcd13aa08c82480092befa46c upstream.
When a raid10 commences a resync/recovery/reshape it allocates
some buffer space.
When a resync/recovery completes the buffer space is freed. But not
when the reshape completes.
This can result in a small memory leak.
There is a subtle side-effect of this bug. When a RAID10 is reshaped
to a larger array (more devices), the reshape is immediately followed
by a "resync" of the new space. This "resync" will use the buffer
space which was allocated for "reshape". This can cause problems
including a "BUG" in the SCSI layer. So this is suitable for -stable.
Fixes: 3ea7daa5d7fde47cd41f4d56c2deb949114da9d6
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ce0b0a46955d1bb389684a2605dbcaa990ba0154 upstream.
raid10 reshape clears unwanted bits from a bio->bi_flags using
a method which, while clumsy, worked until 3.10 when BIO_OWNS_VEC
was added.
Since then it clears that bit but shouldn't. This results in a
memory leak.
So change to used the approved method of clearing unwanted bits.
As this causes a memory leak which can consume all of memory
the fix is suitable for -stable.
Fixes: a38352e0ac02dbbd4fa464dc22d1352b5fbd06fd
Reported-by: mdraid.pkoch@dfgh.net (Peter Koch)
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9c4bdf697c39805078392d5ddbbba5ae5680e0dd upstream.
During recovery of a double-degraded RAID6 it is possible for
some blocks not to be recovered properly, leading to corruption.
If a write happens to one block in a stripe that would be written to a
missing device, and at the same time that stripe is recovering data
to the other missing device, then that recovered data may not be written.
This patch skips, in the double-degraded case, an optimisation that is
only safe for single-degraded arrays.
Bug was introduced in 2.6.32 and fix is suitable for any kernel since
then. In an older kernel with separate handle_stripe5() and
handle_stripe6() functions the patch must change handle_stripe6().
Fixes: 6c0069c0ae9659e3a91b68eaed06a5c6c37f45c8
Cc: Yuri Tikhonov <yur@emcraft.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Reported-by: "Manibalan P" <pmanibalan@amiindia.co.in>
Tested-by: "Manibalan P" <pmanibalan@amiindia.co.in>
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1090423
Signed-off-by: NeilBrown <neilb@suse.de>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6726655dfdd2dc60c035c690d9f10cb69d7ea075 upstream.
There is a following AB-BA dependency between cpu_hotplug.lock and
cpuidle_lock:
1) cpu_hotplug.lock -> cpuidle_lock
enable_nonboot_cpus()
_cpu_up()
cpu_hotplug_begin()
LOCK(cpu_hotplug.lock)
cpu_notify()
...
acpi_processor_hotplug()
cpuidle_pause_and_lock()
LOCK(cpuidle_lock)
2) cpuidle_lock -> cpu_hotplug.lock
acpi_os_execute_deferred() workqueue
...
acpi_processor_cst_has_changed()
cpuidle_pause_and_lock()
LOCK(cpuidle_lock)
get_online_cpus()
LOCK(cpu_hotplug.lock)
Fix this by reversing the order acpi_processor_cst_has_changed() does
thigs -- let it first execute the protection against CPU hotplug by
calling get_online_cpus() and obtain the cpuidle lock only after that (and
perform the symmentric change when allowing CPUs hotplug again and
dropping cpuidle lock).
Spotted by lockdep.
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 236105db632c6279a020f78c83e22eaef746006b upstream.
Currently, notify callbacks for fixed button events are run from
interrupt context. That is not necessary and after commit 0bf6368ee8f2
(ACPI / button: Add ACPI Button event via netlink routine) it causes
netlink routines to be called from interrupt context which is not
correct.
Also, that is different from non-fixed device events (including
non-fixed button events) whose notify callbacks are all executed from
process context.
For the above reasons, make fixed button device notify callbacks run
in process context which will avoid the deadlock when using netlink
to report button events to user space.
Fixes: 0bf6368ee8f2 (ACPI / button: Add ACPI Button event via netlink routine)
Link: https://lkml.org/lkml/2014/8/21/606
Reported-by: Benjamin Block <bebl@mageta.org>
Reported-by: Knut Petersen <Knut_Petersen@t-online.de>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
[rjw: Function names, subject and changelog.]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 8aa5e56eeb61a099ea6519eb30ee399e1bc043ce upstream.
Adds return status check on copy routines to delete the allocated destination
object if either copy fails. Reported by Colin Ian King on bugs.acpica.org,
Bug 1087.
The last applicable commit:
Commit: 3371c19c294a4cb3649aa4e84606be8a1d999e61
Subject: ACPICA: Remove ACPI_GET_OBJECT_TYPE macro
Link: https://bugs.acpica.org/show_bug.cgi?id=1087
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 03a6c3ff3282ee9fa893089304d951e0be93a144 upstream.
bfa_swap_words() shifts its argument (assumed to be 64-bit) by 32 bits
each way. In two places the argument type is dma_addr_t, which may be
32-bit, in which case the effect of the bit shift is undefined:
drivers/scsi/bfa/bfa_fcpim.c: In function 'bfa_ioim_send_ioreq':
drivers/scsi/bfa/bfa_fcpim.c:2497:4: warning: left shift count >= width of type [enabled by default]
addr = bfa_sgaddr_le(sg_dma_address(sg));
^
drivers/scsi/bfa/bfa_fcpim.c:2497:4: warning: right shift count >= width of type [enabled by default]
drivers/scsi/bfa/bfa_fcpim.c:2509:4: warning: left shift count >= width of type [enabled by default]
addr = bfa_sgaddr_le(sg_dma_address(sg));
^
drivers/scsi/bfa/bfa_fcpim.c:2509:4: warning: right shift count >= width of type [enabled by default]
Avoid this by adding casts to u64 in bfa_swap_words().
Compile-tested only.
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Fixes: f16a17507b09 ('[SCSI] bfa: remove all OS wrappers')
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3533f8603d28b77c62d75ec899449a99bc6b77a1 upstream.
On some Windows hosts on FC SANs, TEST_UNIT_READY can return SRB_STATUS_ERROR.
Correctly handle this. Note that there is sufficient sense information to
support scsi error handling even in this case.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 56b26e69c8283121febedd12b3cc193384af46b9 upstream.
On Azure, we have seen instances of unbounded I/O latencies. To deal with
this issue, implement handler that can reset the timeout. Note that the
host gaurantees that it will respond to each command that has been issued.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
[hch: added a better comment explaining the issue]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5b919f3ebb533cbe400664837e24f66a0836b907 upstream.
WM5110/8280 devices do not support bypass mode for LDO1 so remove
the bypass callbacks registered with regulator core.
Signed-off-by: Nikesh Oswal <nikesh@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 46de8ff8e80a6546aa3d2fdf58c6776666301a0c upstream.
single-ulpi-bypass is a flag used for older OMAP3 silicon.
The flag when set, can excite code that improperly uses the
OMAP_UHH_HOSTCONFIG_UPLI_BYPASS define to clear the corresponding bit.
Instead it clears all of the other bits disabling all of the ports in
the process.
Signed-off-by: Michael Welling <mwelling@emacinc.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3e14d83ef94a5806a865b85b513b4e891923c19b upstream.
Regression in 41ab999c. Call to tpm_chip_put is missing. This
will cause TPM device driver not to unload if tmp_get_random()
is called.
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit aee530cfecf4f3ec83b78406bac618cec35853f8 upstream.
spin_is_locked() always returns false for uniprocessor configurations
in several architectures, so do not use WARN_ON with it.
Use lockdep_assert_held() instead to also reduce overhead in
non-debug kernels.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 97ca0d6cc118716840ea443e010cb3d5f2d25eaf upstream.
Commit id 2bd16e3e23d9df41592c6b257c59b6860a9cc3ea
(spi: omap2-mcspi: Do not configure the controller
on each transfer unless needed) does its job too
well so omap2_mcspi_setup_transfer() isn't called
even when an SPI slave driver changes 'spi->mode'.
The result is that the mode requested by the SPI
slave driver never takes effect.
Fix this by adding the 'mode' member to the
omap2_mcspi_cs structure which holds the mode
value that the hardware is configured for.
When the SPI slave driver changes 'spi->mode'
it will be different than the value of this new
member and the SPI master driver will know that
the hardware must be reconfigured (by calling
omap2_mcspi_setup_transfer()).
Fixes: 2bd16e3e23 (spi: omap2-mcspi: Do not configure the controller on each transfer unless needed)
Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e06871cd2c92e5c65d7ca1d32866b4ca5dd4ac30 upstream.
In commit f814f9ac5a81 ("spi/orion: add device tree binding"), Device
Tree support was added to the spi-orion driver. However, this commit
reads the "cell-index" property, without taking into account the fact
that DT properties are big-endian encoded.
Since most of the platforms using spi-orion with DT have apparently
not used anything but cell-index = <0>, the problem was not
visible. But as soon as one starts using cell-index = <1>, the problem
becomes clearly visible, as the master->bus_num gets a wrong value
(actually it gets the value 0, which conflicts with the first bus that
has cell-index = <0>).
This commit fixes that by using of_property_read_u32() to read the
property value, which does the appropriate endianness conversion when
needed.
Fixes: f814f9ac5a81 ("spi/orion: add device tree binding")
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9b29d3c6510407d91786c1cf9183ff4debb3473a upstream.
When multiple devices are detached in __detach_device, they
are also removed from the domains dev_list. This makes it
unsafe to use list_for_each_entry_safe, as the next pointer
might also not be in the list anymore after __detach_device
returns. So just repeatedly remove the first element of the
list until it is empty.
Tested-by: Marti Raudsepp <marti@juffo.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f8ca6ac00d2ba24c5557f08f81439cd3432f0802 upstream.
After the zeroing the whole struct struct media_entity_desc u_ent,
it is no longer necessary to memset(0) its u_ent.name field.
Signed-off-by: Salva Peiró <speiro@ai2.upv.es>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 64ea37bbd8a5815522706f0099ad3f11c7537e15 upstream.
It seems that there's a bug at au0828 hardware/firmware
related to alternate setting: when the device is already at
alt 5, a further call causes the URBs to receive -ESHUTDOWN.
I found two different encarnations of this issue:
1) at qv4l2, it fails the second time we try to open the
video screen;
2) at xawtv, when audio underrun occurs, with is very
frequent, at least on my test machine.
The fix is simple: just check if alt=5 before calling
set_usb_interface().
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4c07e32884ab69574cfd9eb4de3334233c938071 upstream.
The programmed frequency on xc4000 is not the middle
frequency, but the initial frequency on the bandwidth range.
However, the DVB API works with the middle frequency.
This works fine on set_frontend, as the device calculates
the needed offset. However, at get_frequency(), the returned
value is the initial frequency. That's generally not a big
problem on most drivers, however, starting with changeset
6fe1099c7aec, the frequency drift is taken into account at
dib7000p driver.
This broke support for PCTV 340e, with uses dib7000p demod and
xc4000 tuner.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a3eec916cbc17dc1aaa3ddf120836cd5200eb4ef upstream.
The programmed frequency on xc5000 is not the middle
frequency, but the initial frequency on the bandwidth range.
However, the DVB API works with the middle frequency.
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a9ef803d740bfadf5e505fbc57efa57692e27025 upstream.
commit bdd405d2a528 ("usb: hub: Prevent hub autosuspend if
usbcore.autosuspend is -1") causes a build error if CONFIG_PM_RUNTIME is
disabled. Fix that by doing a simple #ifdef guard around it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Roger Quadros <rogerq@ti.com>
Cc: Michael Welling <mwelling@emacinc.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bdd405d2a5287bdb9b04670ea255e1f122138e66 upstream.
If user specifies that USB autosuspend must be disabled by module
parameter "usbcore.autosuspend=-1" then we must prevent
autosuspend of USB hub devices as well.
commit 596d789a211d introduced in v3.8 changed the original behaivour
and stopped respecting the usbcore.autosuspend parameter for hubs.
Fixes: 596d789a211d "USB: set hub's default autosuspend delay as 0"
Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Michael Welling <mwelling@emacinc.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6817ae225cd650fb1c3295d769298c38b1eba818 upstream.
This patch fixes a potential security issue in the whiteheat USB driver
which might allow a local attacker to cause kernel memory corrpution. This
is due to an unchecked memcpy into a fixed size buffer (of 64 bytes). On
EHCI and XHCI busses it's possible to craft responses greater than 64
bytes leading a buffer overflow.
Signed-off-by: James Forshaw <forshaw@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 646907f5bfb0782c731ae9ff6fb63471a3566132 upstream.
Added support to the ftdi_sio driver for ekey Converter USB which
uses an FT232BM chip.
Signed-off-by: Jaša Bartelj <jasa.bartelj@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6552cc7f09261db2aeaae389aa2c05a74b3a93b4 upstream.
Add device id for Basic Micro ATOM Nano USB2Serial adapters.
Reported-by: Nicolas Alt <n.alt@mytum.de>
Tested-by: Nicolas Alt <n.alt@mytum.de>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2597fe99bb0259387111d0431691f5daac84f5a5 upstream.
AMD xHC also needs short tx quirk after tested on most of chipset
generations. That's because there is the same incorrect behavior like
Fresco Logic host. Please see below message with on USB webcam
attached on xHC host:
[ 139.262944] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.266934] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.270913] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.274937] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.278914] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.282936] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.286915] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.290938] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.294913] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
[ 139.298917] xhci_hcd 0000:00:10.0: WARN Successful completion on short TX: needs XHCI_TRUST_TX_LENGTH quirk?
Reported-by: Arindam Nath <arindam.nath@amd.com>
Tested-by: Shriraj-Rai P <shriraj-rai.p@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9a54886342e227433aebc9d374f8ae268a836475 upstream.
When using a Renesas uPD720231 chipset usb-3 uas to sata bridge with a 120G
Crucial M500 ssd, model string: Crucial_ CT120M500SSD1, together with a
the integrated Intel xhci controller on a Haswell laptop:
00:14.0 USB controller [0c03]: Intel Corporation 8 Series USB xHCI HC [8086:9c31] (rev 04)
The following error gets logged to dmesg:
xhci error: Transfer event TRB DMA ptr not part of current TD
Treating COMP_STOP the same as COMP_STOP_INVAL when no event_seg gets found
fixes this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 28a821c306889b9f2c3fff49abedc9b2c743eb73 upstream.
This function is largely a duplicate of paste_selection() in
drivers/tty/vt/selection.c, but with its own selection state. The
speakup selection mechanism should really be merged with vt.
For now, apply the changes from 'TTY: vt, fix paste_selection ldisc
handling', 'tty: Make ldisc input flow control concurrency-friendly',
and 'tty: Fix unsafe vt paste_selection()'.
References: https://bugs.debian.org/735202
References: https://bugs.debian.org/744015
Reported-by: Paul Gevers <elbrus@debian.org>
Reported-and-tested-by: Jarek Czekalski <jarekczek@poczta.onet.pl>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
[bwh: Backported to 3.10:
- Only apply the changes from 'TTY: vt, fix paste_selection ldisc handling'
- Add the same FIXME comment as vt's paste_selection() has in this version]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 8e8248b1369c97c7bb6f8bcaee1f05deeabab8ef upstream.
NFC will leak buffer if send failed.
Use single exit point that does the freeing
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 73ab4232388b7a08f17c8d08141ff2099fa0b161 upstream.
If connect request is queued (e.g. device in pg) set client state
to initializing, thus avoid preliminary exit in wait if current
state is disconnected.
This is regression from:
commit e4d8270e604c3202131bac607969605ac397b893
Author: Alexander Usyskin <alexander.usyskin@intel.com>
mei: set connecting state just upon connection request is sent to the fw
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0758f4f732b08b6ef07f2e5f735655cf69fea477 upstream.
When copy_from_user fails, return -EFAULT, not -ENOMEM
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: Robert Elliott <elliott@hp.com>
Reviewed-by: Joe Handzik <joseph.t.handzik@hp.com>
Reviewed-by: Scott Teel <scott.teel@hp.com>
Reviewed by: Mike MIller <michael.miller@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e1f8859ee265fc89bd21b4dca79e8e983a044892 upstream.
The interrupt handler in the ux500 crypto driver has an obviously
incorrect way to access the data buffer, which for a while has
caused this build warning:
../ux500/cryp/cryp_core.c: In function 'cryp_interrupt_handler':
../ux500/cryp/cryp_core.c:234:5: warning: passing argument 1 of '__fswab32' makes integer from pointer without a cast [enabled by default]
writel_relaxed(ctx->indata,
^
In file included from ../include/linux/swab.h:4:0,
from ../include/uapi/linux/byteorder/big_endian.h:12,
from ../include/linux/byteorder/big_endian.h:4,
from ../arch/arm/include/uapi/asm/byteorder.h:19,
from ../include/asm-generic/bitops/le.h:5,
from ../arch/arm/include/asm/bitops.h:340,
from ../include/linux/bitops.h:33,
from ../include/linux/kernel.h:10,
from ../include/linux/clk.h:16,
from ../drivers/crypto/ux500/cryp/cryp_core.c:12:
../include/uapi/linux/swab.h:57:119: note: expected '__u32' but argument is of type 'const u8 *'
static inline __attribute_const__ __u32 __fswab32(__u32 val)
There are at least two, possibly three problems here:
a) when writing into the FIFO, we copy the pointer rather than the
actual data we want to give to the hardware
b) the data pointer is an array of 8-bit values, while the FIFO
is 32-bit wide, so both the read and write access fail to do
a proper type conversion
c) This seems incorrect for big-endian kernels, on which we need to
byte-swap any register access, but not normally FIFO accesses,
at least the DMA case doesn't do it either.
This converts the bogus loop to use the same readsl/writesl pair
that we use for the two other modes (DMA and polling). This is
more efficient and consistent, and probably correct for endianess.
The bug has existed since the driver was first merged, and was
probably never detected because nobody tried to use interrupt mode.
It might make sense to backport this fix to stable kernels, depending
on how the crypto maintainers feel about that.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-crypto@vger.kernel.org
Cc: Fabio Baltieri <fabio.baltieri@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ae84db9661cafc63d179e1d985a2c5b841ff0ac4 upstream.
When a tty is opened for the serial console, the termios c_cflag
settings are inherited from the console line settings.
However, if the tty is subsequently closed, the termios settings
are lost. This results in a garbled console if the console is later
suspended and resumed.
Preserve the termios c_cflag for the serial console when the tty
is shutdown; this reflects the most recent line settings.
Fixes: Bugzilla #69751, 'serial console does not wake from S3'
Reported-by: Valerio Vanni <valerio.vanni@inwind.it>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 28772ac8711e4d7268c06e765887dd8cb6924f98 upstream.
dma_{un}map_* uses 'enum dma_data_direction' not 'enum dma_transfer_direction'.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit d58e47d787c09fe5c61af3c6ce7d784762f29c3d upstream.
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.
Voltage limits, fan minimum speed, pwm frequency, pwm ramp rate, and
other attributes have the same problem, fix them as well.
Zone temperature limits are signed, but were cached as u8, causing
unepected values to be reported for negative temperatures. Cache as
s8 to fix the problem.
vrm is an u8, so the written value needs to be limited to [0, 255].
Signed-off-by: Axel Lin <axel.lin@ingics.com>
[Guenter Roeck: Fix zone temperature cache]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e981429557cbe10c780fab1c1a237cb832757652 upstream.
Current code uses data_rate as array index in ads1015_read_adc() and uses pga
as array index in ads1015_reg_to_mv, so we must make sure both data_rate and
pga settings are in valid value range.
Return -EINVAL if the setting is out-of-range.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3248c3b771ddd9d31695da17ba350eb6e1b80a53 upstream.
Temperature limit register writes did not account for negative numbers.
As a result, writing -127000 resulted in -126000 written into the
temperature limit register. This problem affected temp[1-3]_min,
temp[1-3]_max, temp[1-3]_auto_temp_crit, and temp[1-3]_auto_temp_min.
When writing pwm[1-3]_freq, a long variable was auto-converted into an int
without range check. Wiring values larger than MAXINT resulted in unexpected
register values.
When writing temp[1-3]_auto_temp_max, an unsigned long variable was
auto-converted into an int without range check. Writing values larger than
MAXINT resulted in unexpected register values.
vrm is an u8, so the written value needs to be limited to [0, 255].
Cc: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 56de1377ad92f72ee4e5cb0faf7a9b6048fdf0bf upstream.
Current code uses channel as array index, so the valid channel value is
0 .. ADS1015_CHANNELS - 1.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2565fb05d1e9fc0831f7b1c083bcfcb1cba1f020 upstream.
On platforms with sizeof(int) < sizeof(unsigned long), writing a rpm value
larger than MAXINT will result in unpredictable limit values written to the
chip. Avoid auto-conversion from unsigned long to int to fix the problem.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1074d683a51f1aded3562add9ef313e75d557327 upstream.
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.
Cc: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit cc336546ddca8c22de83720632431c16a5f9fe9a upstream.
On platforms with sizeof(int) < sizeof(long), writing a temperature
limit larger than MAXINT will result in unpredictable limit values
written to the chip. Avoid auto-conversion from long to int to fix
the problem.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2d31ca3ad7d5d44c8adc7f253c96ce33f3a2e931 upstream.
Regular randconfig nightly testing has detected problems with omapdrm.
omapdrm fails to build when the kernel is built to support 64-bit DMA
addresses and/or 64-bit physical addresses due to an assumption about
the width of these types.
Use %pad to print DMA addresses, rather than %x or %Zx (which is even
more wrong than %x). Avoid passing a uint32_t pointer into a function
which expects dma_addr_t pointer.
drivers/gpu/drm/omapdrm/omap_plane.c: In function 'omap_plane_pre_apply':
drivers/gpu/drm/omapdrm/omap_plane.c:145:2: error: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_plane.c:145:2: error: format '%x' expects argument of type 'unsigned int', but argument 6 has type 'dma_addr_t' [-Werror=format]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_plane.o] Error 1
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_get_paddr':
drivers/gpu/drm/omapdrm/omap_gem.c:794:4: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_describe':
drivers/gpu/drm/omapdrm/omap_gem.c:991:4: error: format '%Zx' expects argument of type 'size_t', but argument 7 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_init':
drivers/gpu/drm/omapdrm/omap_gem.c:1470:4: error: format '%x' expects argument of type 'unsigned int', but argument 7 has type 'dma_addr_t' [-Werror=format]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_gem.o] Error 1
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c: In function 'dmm_txn_append':
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:226:2: error: passing argument 3 of 'alloc_dma' from incompatible pointer type [-Werror]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_dmm_tiler.o] Error 1
make[5]: Target `__build' not remade because of errors.
make[4]: *** [drivers/gpu/drm/omapdrm] Error 2
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 22b987a325701223f9a37db700c6eb20b9924c6f upstream.
Link must be reset in case the fw doesn't
respond to client disconnect request.
We did charge the timer only in irq path
from mei_cl_irq_close and not in mei_cl_disconnect
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a40178b2fa6ad87670fb1e5fa4024db00c149629 upstream.
Problem Summary: Problem has been observed generally with PM states
where VBUS goes off during suspend. There are some SS USB devices which
take longer time for link training compared to many others. Such
devices fail to reconnect with same old address which was associated
with it before suspend.
When system resumes, at some point of time (dpm_run_callback->
usb_dev_resume->usb_resume->usb_resume_both->usb_resume_device->
usb_port_resume) SW reads hub status. If device is present,
then it finishes port resume and re-enumerates device with same
address. If device is not present then, SW thinks that device was
removed during suspend and therefore does logical disconnection
and removes all the resource allocated for this device.
Now, if I put sufficient delay just before root hub status read in
usb_resume_device then, SW sees always that device is present. In normal
course(without any delay) SW sees that no device is present and then SW
removes all resource associated with the device at this port. In the
latter case, after sometime, device says that hey I am here, now host
enumerates it, but with new address.
Problem had been reproduced when I connect verbatim USB3.0 hard disc
with my STiH407 XHCI host running with 3.10 kernel.
I see that similar problem has been reported here.
https://bugzilla.kernel.org/show_bug.cgi?id=53211
Reading above it seems that bug was not in 3.6.6 and was present in 3.8
and again it was not present for some in 3.12.6, while it was present
for few others. I tested with 3.13-FC19 running at i686 desktop, problem
was still there. However, I was failed to reproduce it with 3.16-RC4
running at same i686 machine. I would say it is just a random
observation. Problem for few devices is always there, as I am unable to
find a proper fix for the issue.
So, now question is what should be the amount of delay so that host is
always able to recognize suspended device after resume.
XHCI specs 4.19.4 says that when Link training is successful, port sets
CSC bit to 1. So if SW reads port status before successful link
training, then it will not find device to be present. USB Analyzer log
with such buggy devices show that in some cases device switch on the
RX termination after long delay of host enabling the VBUS. In few other
cases it has been seen that device fails to negotiate link training in
first attempt. It has been reported till now that few devices take as
long as 2000 ms to train the link after host enabling its VBUS and
RX termination. This patch implements a 2000 ms timeout for CSC bit to set
ie for link training. If in a case link trains before timeout, loop will
exit earlier.
This patch implements above delay, but only for SS device and when
persist is enabled.
So, for the good device overhead is almost none. While for the bad
devices penalty could be the time which it take for link training.
But, If a device was connected before suspend, and was removed
while system was asleep, then the penalty would be the timeout ie
2000 ms.
Results:
Verbatim USB SS hard disk connected with STiH407 USB host running 3.10
Kernel resumes in 461 msecs without this patch, but hard disk is
assigned a new device address. Same system resumes in 790 msecs with
this patch, but with old device address.
Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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