[S390] dasd: fix locking in __dasd_device_process_final_queue

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After setting the status of the cqr and releasing the lock for the
block cqr queue, we call the cqr callback function, which will usually
just trigger the dasd_block_tasklet. But when the tasklet is already
running the cqr might be processed before we invoke the callback
function. In rare cases the callback pointer may already be invalid
by the time we want to call it, which will result in a panic.
Solution: Call the callback function first and then release the lock.

Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Stefan Weinhuber 2008-02-19 15:29:27 +01:00 • committed by Martin Schwidefsky

parent 11ab244c9f

commit 03513bccad

1 changed files with 6 additions and 6 deletions

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drivers/s390/block/dasd.c

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