[SCSI] qla2xxx: Fix race that could hang kthread_stop()

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There is a small race window in qla2x00_do_dpc() between
checking for kthread_should_stop() and going to sleep after
setting TASK_INTERRUPTIBLE. If qla2x00_free_device() is called
in this window, kthread_stop will wait forever because there
will be no one to wake up the process.

Fix by making sure we only set TASK_INTERRUPTIBLE before checking
kthread_stop().

Reported-by: Bandan Das <bandan.das@stratus.com>
Acked-by: Madhuranath Iyengar <Madhu.Iyengar@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

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James Bottomley 2011-01-27 16:12:37 -05:00

parent 3c6c0d6ca3

commit 563585ec4b

1 changed files with 3 additions and 1 deletions

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drivers/scsi/qla2xxx/qla_os.c

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