[patch 7/16] s390: fba dasd i/o errors.

From: Martin Schwidefsky
Date: Tue Jun 21 2005 - 11:40:04 EST


[patch 7/16] s390: fba dasd i/o errors.

From: Horst Hummel <horst.hummel@xxxxxxxxxx>

The FBA discipline does not use retries for failed requests. A request
fails after the first unsuccessful start attempt. There are some rare
conditions (e.g. CIO path recovery) in which the start of an i/o on
a fba device can fail. A tiny amount of retries is therefore
reasonable.

Signed-off-by: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>

diffstat:
drivers/s390/block/dasd_fba.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletion(-)

diff -urpN linux-2.6/drivers/s390/block/dasd_fba.c linux-2.6-patched/drivers/s390/block/dasd_fba.c
--- linux-2.6/drivers/s390/block/dasd_fba.c 2005-06-17 21:48:29.000000000 +0200
+++ linux-2.6-patched/drivers/s390/block/dasd_fba.c 2005-06-21 17:36:49.000000000 +0200
@@ -4,7 +4,7 @@
* Bugreports.to..: <Linux390@xxxxxxxxxx>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
*
- * $Revision: 1.39 $
+ * $Revision: 1.40 $
*/

#include <linux/config.h>
@@ -354,6 +354,8 @@ dasd_fba_build_cp(struct dasd_device * d
}
cqr->device = device;
cqr->expires = 5 * 60 * HZ; /* 5 minutes */
+ cqr->retries = 32;
+ cqr->buildclk = get_clock();
cqr->status = DASD_CQR_FILLED;
return cqr;
}
-
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