From 1842f2b1847155805f9cc8c834ef4272198b272b Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Fri, 12 Oct 2007 16:11:22 +0200 Subject: [PATCH] [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 Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/cio.c | 5 +++++ drivers/s390/cio/device.c | 2 ++ 2 files changed, 7 insertions(+) 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 #include #include /* HZ */ +#include #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 = { -- 2.20.1