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| author | Alan Stern <stern@rowland.harvard.edu> | 2015-01-29 23:05:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <greg@kroah.com> | 2015-01-31 20:05:06 +0300 |
| commit | 074f9dd55f9cab1b82690ed7e44bcf38b9616ce0 (patch) | |
| tree | 5ef4e9054a862b930cd75f394f2c0a62e14361b2 /include/linux/usb/hcd.h | |
| parent | 3f2cee73b650921b2e214bf487b2061a1c266504 (diff) | |
| download | linux-074f9dd55f9cab1b82690ed7e44bcf38b9616ce0.tar.xz | |
USB: add flag for HCDs that can't receive wakeup requests (isp1760-hcd)
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>
CC: <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
Diffstat (limited to 'include/linux/usb/hcd.h')
| -rw-r--r-- | include/linux/usb/hcd.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h index 8968f616e414..68b1e836dff1 100644 --- a/include/linux/usb/hcd.h +++ b/include/linux/usb/hcd.h @@ -146,6 +146,8 @@ struct usb_hcd { unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */ unsigned can_do_streams:1; /* HC supports streams */ unsigned tpl_support:1; /* OTG & EH TPL support */ + unsigned cant_recv_wakeups:1; + /* wakeup requests from downstream aren't received */ unsigned int irq; /* irq allocated */ void __iomem *regs; /* device memory/io */ |