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[PATCH] s390: re-activated path detection

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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>
This commit is contained in:
Cornelia Huck 2006-01-06 00:19:13 -08:00 committed by Linus Torvalds
parent 089545f0c7
commit 6810a2bce3
1 changed files with 15 additions and 0 deletions
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15
drivers/s390/cio/device_pgid.c
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@ -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);
}