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s390x/css: fix control flags during csch 

From the beginning, css support contained an error in csch handling:
instead of setting the clear bit in the function control bits twice, we
need to set the clear pending bit in the activity control bits. Let's
fix this.

Cc: qemu-stable@nongnu.org
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
(cherry picked from commit 4c6bf79a22)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
stable-2.5
Halil Pasic 2016-01-20 19:51:30 +01:00 committed by Michael Roth
parent d98392379a
commit 091af18104
1 changed files with 1 additions and 1 deletions
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2
hw/s390x/css.c
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@ -701,7 +701,7 @@ int css_do_csch(SubchDev *sch)
/* Trigger the clear function. */
s->ctrl &= ~(SCSW_CTRL_MASK_FCTL | SCSW_CTRL_MASK_ACTL);
s->ctrl |= SCSW_FCTL_CLEAR_FUNC | SCSW_FCTL_CLEAR_FUNC;
s->ctrl |= SCSW_FCTL_CLEAR_FUNC | SCSW_ACTL_CLEAR_PEND;
do_subchannel_work(sch, NULL);
ret = 0;