Martin Schwidefsky 4657fb8a98 [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>

2008-05-30 10:03:36 +02:00

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