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s390/dasd: Implement block timeout handling

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This patch implements generic block layer timeout handling
callbacks for DASDs. When the timeout expires the respective
cqr is aborted.

With this timeout handler time-critical request abort
is guaranteed as the abort does not depend on the internal
state of the various DASD driver queues.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Acked-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hannes Reinecke
2013-01-30 09:26:14 +00:00
committed by Martin Schwidefsky
parent 1fbdb8be9b
commit a2ace46632
4 changed files with 88 additions and 2 deletions
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5
drivers/s390/block/dasd_fba.c
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@@ -428,7 +428,10 @@ out:
static void dasd_fba_handle_terminated_request(struct dasd_ccw_req *cqr)
{
cqr->status = DASD_CQR_FILLED;
if (cqr->retries < 0)
cqr->status = DASD_CQR_FAILED;
else
cqr->status = DASD_CQR_FILLED;
};
static int