tree 63336375166a322f3f1c61413c23f162eb847e18
parent 0a1f348c429a6af0ba6448e5b3ae08dbc8e28696
author Christian Borntraeger <borntraeger@de.ibm.com> 1369309901 +0200
committer Anthony Liguori <aliguori@us.ibm.com> 1370022646 -0500

s390/ipl: Fix spurious errors in virtio

With the ccw ipl code sometimes an error message like
"virtio: trying to map MMIO memory" or
"Guest moved used index from %u to %u" appeared. Turns out
that the ccw bios did not zero out the vring, which might
cause stale values in avail->idx and friends, especially
on reboot.

Lets zero out the relevant fields. To activate the patch we
need to rebuild s390-ccw.img as well.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-id: 1369309901-418-1-git-send-email-borntraeger@de.ibm.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>