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authorCornelia Huck <cohuck@de.ibm.com>2006-01-06 00:19:13 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:49 -0800
commit6810a2bce3aa6573faa9920487274f166fe95c6e (patch)
tree96426b1a7b63fa1f1f40762d27c946ef0013357a
parent089545f0c71bab6511395c2a060d7f81a99bad58 (diff)
downloadlinux-linaro-stable-6810a2bce3aa6573faa9920487274f166fe95c6e.tar.gz
[PATCH] s390: re-activated path detection
If we receive path not operational indications (pnom in pmcw nonzero), we switch off those paths. To catch them becoming available again, we have to recalculate the lpm from the pmcw each time we start path verification. Signed-off-by: Cornelia Huck <cohuck@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>
-rw-r--r--drivers/s390/cio/device_pgid.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/s390/cio/device_pgid.c b/drivers/s390/cio/device_pgid.c
index 0adac8a67331..757b2706d5a9 100644
--- a/drivers/s390/cio/device_pgid.c
+++ b/drivers/s390/cio/device_pgid.c
@@ -22,6 +22,7 @@
#include "cio_debug.h"
#include "css.h"
#include "device.h"
+#include "ioasm.h"
/*
* Start Sense Path Group ID helper function. Used in ccw_device_recog
@@ -364,8 +365,22 @@ ccw_device_verify_irq(struct ccw_device *cdev, enum dev_event dev_event)
void
ccw_device_verify_start(struct ccw_device *cdev)
{
+ struct subchannel *sch = to_subchannel(cdev->dev.parent);
+
cdev->private->flags.pgid_single = 0;
cdev->private->iretry = 5;
+ /*
+ * Update sch->lpm with current values to catch paths becoming
+ * available again.
+ */
+ if (stsch(sch->irq, &sch->schib)) {
+ ccw_device_verify_done(cdev, -ENODEV);
+ return;
+ }
+ sch->lpm = sch->schib.pmcw.pim &
+ sch->schib.pmcw.pam &
+ sch->schib.pmcw.pom &
+ sch->opm;
__ccw_device_verify_start(cdev);
}