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[S390] cio: Disable channel measurements (cmf) on shutdown/reboot.

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Disable channel measurements for all ccw devices via the ccw bus's
shutdown method. Clear residual cmf related information that may be
in the schib when setting up a new subchannel.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Cornelia Huck 2007-10-12 16:11:22 +02:00 committed by Martin Schwidefsky
parent 958974fb59
commit 1842f2b184
2 changed files with 7 additions and 0 deletions
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5
drivers/s390/cio/cio.c
View File

@ -619,6 +619,11 @@ cio_validate_subchannel (struct subchannel *sch, struct subchannel_id schid)
sch->schib.pmcw.ena = 0;
if ((sch->lpm & (sch->lpm - 1)) != 0)
sch->schib.pmcw.mp = 1; /* multipath mode */
/* clean up possible residual cmf stuff */
sch->schib.pmcw.mme = 0;
sch->schib.pmcw.mbfc = 0;
sch->schib.pmcw.mbi = 0;
sch->schib.mba = 0;
return 0;
out:
if (!cio_is_console(schid))

2
drivers/s390/cio/device.c
View File

@ -21,6 +21,7 @@
#include <asm/ccwdev.h>
#include <asm/cio.h>
#include <asm/param.h> /* HZ */
#include <asm/cmb.h>
#include "cio.h"
#include "cio_debug.h"
@ -1440,6 +1441,7 @@ static void ccw_device_shutdown(struct device *dev)
cdev = to_ccwdev(dev);
if (cdev->drv && cdev->drv->shutdown)
cdev->drv->shutdown(cdev);
disable_cmf(cdev);
}
struct bus_type ccw_bus_type = {