| commit | bf9503f11dedf40158a8a5847f2d482bc15cd82b | |
| author | Christian Gromm <christian.gromm@microchip.com> | |
| Fri, 19 Aug 2016 09:12:54 +0000 (19 11:12 +0200) | ||
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| Sun, 21 Aug 2016 14:53:57 +0000 (21 16:53 +0200) | ||
| tree | 7319082a573eb27c01ede556eed44ded6dd9ef2e | treesnapshot (tar.gz zip) |
| parent | cf05918370006fbdb6dc5708ca9951ee8093b8ef | commitdiff |
staging: most: hdm-usb: fix race between enqueue and most_stop_enqueue
The "broken in pipe" handler of the USB-HDM calls most_stop_enqueue() to
stop the MBO traffic before returning all MBOs back to the Mostcore. As
the enqueue() call from the Mostcore may run in parallel with the
most_stop_enqueue(), the HDM may run into the inconsistent state and
crash the kernel.
This patch synchronizes enqueue(), most_stop_enqueue() and
most_resume_enqueue() with a mutex, hence avoiding the race condition.
Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The "broken in pipe" handler of the USB-HDM calls most_stop_enqueue() to
stop the MBO traffic before returning all MBOs back to the Mostcore. As
the enqueue() call from the Mostcore may run in parallel with the
most_stop_enqueue(), the HDM may run into the inconsistent state and
crash the kernel.
This patch synchronizes enqueue(), most_stop_enqueue() and
most_resume_enqueue() with a mutex, hence avoiding the race condition.
Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| drivers/staging/most/hdm-usb/hdm_usb.c | diffblobblamehistory | |
| drivers/staging/most/mostcore/core.c | diffblobblamehistory |