| commit | 4657fb8a98a4e02981a574492bbe470c147b6657 | |
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Fri, 30 May 2008 08:03:33 +0000 (30 10:03 +0200) | ||
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Fri, 30 May 2008 08:03:36 +0000 (30 10:03 +0200) | ||
| tree | 9363e9452ce5b798cad43b83b0276bda6a7568c9 | treesnapshot (tar.gz zip) |
| parent | 54ad64129cc166b9eec7151f3f9fc83589e33555 | commitdiff |
[S390] tape: fix race with stack local wait_queue_head_t.
A wait_event call with a stack local wait_queue_head_t structure that is
used to do the wake up for the wait_event is inherently racy. After the
wait_event finished the wake_up call might not have completed yet.
Replace the stack local wait_queue_head_t in tape_do_io and
tape_do_io_interruptible with a per device wait queue.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
A wait_event call with a stack local wait_queue_head_t structure that is
used to do the wake up for the wait_event is inherently racy. After the
wait_event finished the wake_up call might not have completed yet.
Replace the stack local wait_queue_head_t in tape_do_io and
tape_do_io_interruptible with a per device wait queue.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| drivers/s390/char/tape.h | diffblobblamehistory | |
| drivers/s390/char/tape_core.c | diffblobblamehistory |