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[PATCH] s390: tape operation abortion leads to panic

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When a request is aborted because of a signal, we currently stop the request
via csh, but we do not wait for the interrupt of csh in any case.  We free the
request structure and therefore when the interrupt for the csh operation is
presented, the request object is no longer valid and an invalid callback
pointer is used.

To fix this wait until the interrupt for csh arrives and until
wait_event_interruptible() does not return -ERESTARTSYS.

Signed-off-by: Michael Holzheu <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Michael Holzheu 2006-03-24 03:15:27 -08:00 • committed by Linus Torvalds
commit 4cd190a736
1 changed files with 1 additions and 1 deletions
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2
drivers/s390/char/tape_core.c
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@ -1015,7 +1015,7 @@ tape_do_io_interruptible(struct tape_device *device,
wq,
(request->callback == NULL)
);
} while (rc != -ERESTARTSYS);
} while (rc == -ERESTARTSYS);
DBF_EVENT(3, "IO stopped on %08x\n", device->cdev_id);
rc = -ERESTARTSYS;