Messages in this thread Patch in this message |  | | | Date | Thu, 04 Oct 2007 13:27:16 +0200 | | From | Martin Schwidefsky <> | | Subject | [patch 10/34] cio: Disable channel measurements (cmf) on shutdown/reboot. |
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From: Cornelia Huck <cornelia.huck@de.ibm.com>
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> --- drivers/s390/cio/cio.c | 5 +++++ drivers/s390/cio/device.c | 2 ++ 2 files changed, 7 insertions(+) Index: quilt-2.6/drivers/s390/cio/cio.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/cio.c +++ quilt-2.6/drivers/s390/cio/cio.c @@ -619,6 +619,11 @@ cio_validate_subchannel (struct subchann 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)) Index: quilt-2.6/drivers/s390/cio/device.c =================================================================== --- quilt-2.6.orig/drivers/s390/cio/device.c +++ quilt-2.6/drivers/s390/cio/device.c @@ -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 d cdev = to_ccwdev(dev); if (cdev->drv && cdev->drv->shutdown) cdev->drv->shutdown(cdev); + disable_cmf(cdev); } struct bus_type ccw_bus_type = { -- blue skies, Martin.
"Reality continues to ruin my life." - Calvin.
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