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authorHorst Hummel <horst.hummel@de.ibm.com>2006-01-06 00:19:15 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:50 -0800
commit1c01b8a5963aec60488c1c97d67cffd8b5275e3f (patch)
tree48eb6c300541d77ff2cc5d8949ce5788fab1d82f /drivers/s390/block/dasd_diag.c
parent9a7af289660dc749d7c58234191601046a9bf488 (diff)
downloadop-kernel-dev-1c01b8a5963aec60488c1c97d67cffd8b5275e3f.zip
op-kernel-dev-1c01b8a5963aec60488c1c97d67cffd8b5275e3f.tar.gz
[PATCH] s390: dasd failfast support
To properly support multipath-failover handling, the linux block layer has introduced a special request flag, 'REQ_FAILFAST'. This flag is now used to return requests immediately in case the device is not operational. Signed-off-by: Horst Hummel <horst.hummel@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/s390/block/dasd_diag.c')
-rw-r--r--drivers/s390/block/dasd_diag.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c
index 16c4b7d..a33d406 100644
--- a/drivers/s390/block/dasd_diag.c
+++ b/drivers/s390/block/dasd_diag.c
@@ -6,7 +6,7 @@
* Bugreports.to..: <Linux390@de.ibm.com>
* (C) IBM Corporation, IBM Deutschland Entwicklung GmbH, 1999,2000
*
- * $Revision: 1.52 $
+ * $Revision: 1.53 $
*/
#include <linux/config.h>
@@ -549,6 +549,8 @@ dasd_diag_build_cp(struct dasd_device * device, struct request *req)
}
cqr->retries = DIAG_MAX_RETRIES;
cqr->buildclk = get_clock();
+ if (req->flags & REQ_FAILFAST)
+ set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->device = device;
cqr->expires = DIAG_TIMEOUT;
cqr->status = DASD_CQR_FILLED;
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