diff options
| author | Huang Rui <ray.huang@amd.com> | 2013-06-27 01:08:11 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-04 16:25:49 +0800 |
| commit | 76d54f0afc8f8cfea8ad8ea1b7c9e2fda617d48a (patch) | |
| tree | b77d40bff5733aad2fd29cd358c87f0670d1008c /drivers | |
| parent | 79bc1750fe6730db008745dee617f2e32789d3f9 (diff) | |
usb: dwc3: fix wrong bit mask in dwc3_event_type
commit 1974d494dea05ea227cb42f5e918828801e237aa upstream.
Per dwc3 2.50a spec, the is_devspec bit is used to distinguish the
Device Endpoint-Specific Event or Device-Specific Event (DEVT). If the
bit is 1, the event is represented Device-Specific Event, then use
[7:1] bits as Device Specific Event to marked the type. It has 7 bits,
and we can see the reserved8_31 variable name which means from 8 to 31
bits marked reserved, actually there are 24 bits not 25 bits between
that. And 1 + 7 + 24 = 32, the event size is 4 byes.
So in dwc3_event_type, the bit mask should be:
is_devspec [0] 1 bit
type [7:1] 7 bits
reserved8_31 [31:8] 24 bits
This patch should be backported to kernels as old as 3.2, that contain
the commit 72246da40f3719af3bfd104a2365b32537c27d83 "usb: Introduce
DesignWare USB3 DRD Driver".
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc3/core.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 6c7945b4cad3..29a68f0a9765 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -641,8 +641,8 @@ struct dwc3 { struct dwc3_event_type { u32 is_devspec:1; - u32 type:6; - u32 reserved8_31:25; + u32 type:7; + u32 reserved8_31:24; } __packed; #define DWC3_DEPEVT_XFERCOMPLETE 0x01 |