diff options
| author | Johan Hovold <jhovold@gmail.com> | 2014-05-26 13:23:37 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-27 18:04:09 -0400 |
| commit | e144ed28bed10684f9aaec6325ed974d53f76110 (patch) | |
| tree | bac73dbef9647f9c5af0f1d852e1c89fe838c982 /drivers/usb/class/cdc-acm.h | |
| parent | 5a345c20c17d87099224a4be12e69e5bd7023dca (diff) | |
USB: cdc-acm: fix write and resume race
Fix race between write() and resume() due to improper locking that could
lead to writes being reordered.
Resume must be done atomically and susp_count be protected by the
write_lock in order to prevent racing with write(). This could otherwise
lead to writes being reordered if write() grabs the write_lock after
susp_count is decremented, but before the delayed urb is submitted.
Fixes: 11ea859d64b6 ("USB: additional power savings for cdc-acm devices
that support remote wakeup")
Cc: <stable@vger.kernel.org> # v2.6.27
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/class/cdc-acm.h')
0 files changed, 0 insertions, 0 deletions