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authorCornelia Huck <cornelia.huck@de.ibm.com>2007-10-12 16:11:22 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-10-12 16:13:01 +0200
commit1842f2b1847155805f9cc8c834ef4272198b272b (patch)
treeb887ba8c29702a378c408c12702e8d5c6ce131ac /drivers/s390/cio
parent[S390] cio: Introduce ccw_bus_type.shutdown. (diff)
downloadlinux-1842f2b1847155805f9cc8c834ef4272198b272b.tar.xz
linux-1842f2b1847155805f9cc8c834ef4272198b272b.zip
[S390] cio: Disable channel measurements (cmf) on shutdown/reboot.
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>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/cio.c5
-rw-r--r--drivers/s390/cio/device.c2
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c
index f2708d65be5a..46905345159e 100644
--- a/drivers/s390/cio/cio.c
+++ b/drivers/s390/cio/cio.c
@@ -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))
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 7fb271c60c27..eea9b1de0af7 100644
--- a/drivers/s390/cio/device.c
+++ b/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 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 = {