Commit 6810a2bc authored by Cornelia Huck's avatar Cornelia Huck Committed by Linus Torvalds
Browse files

[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: default avatarCornelia Huck <cohuck@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 089545f0

drivers/s390/cio/device_pgid.c

+15 −0
Original line number Diff line number Diff line
@@ -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);

}