diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2015-01-29 15:05:04 -0500 |
|---|---|---|
| committer | Zefan Li <lizefan@huawei.com> | 2015-06-19 11:40:13 +0800 |
| commit | 019b694fbccafebc550a7b1fcb3bb13e9b32ae03 (patch) | |
| tree | e32872c68d09000e77cebdd67dd7f27a2fd5308b /include | |
| parent | a54c78b91ad0058aef14fd4804e5d6f8e253cf2b (diff) | |
USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd)
commit 074f9dd55f9cab1b82690ed7e44bcf38b9616ce0 upstream.
Currently the USB stack assumes that all host controller drivers are
capable of receiving wakeup requests from downstream devices.
However, this isn't true for the isp1760-hcd driver, which means that
it isn't safe to do a runtime suspend of any device attached to a
root-hub port if the device requires wakeup.
This patch adds a "cant_recv_wakeups" flag to the usb_hcd structure
and sets the flag in isp1760-hcd. The core is modified to prevent a
direct child of the root hub from being put into runtime suspend with
wakeup enabled if the flag is set.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/usb/hcd.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 6674ec0c7892..feb77716a90f 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -126,6 +126,7 @@ struct usb_hcd { unsigned wireless:1; /* Wireless USB HCD */ unsigned authorized_default:1; unsigned has_tt:1; /* Integrated TT in root hub */ + unsigned cant_recv_wakeups:1; unsigned int irq; /* irq allocated */ void __iomem *regs; /* device memory/io */ |