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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2013-06-05 17:13:05 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2013-06-06 10:25:59 +0200 |
| commit | d1db1fa8dfcea9c62643f624f2a07d2fd375ce45 (patch) | |
| tree | 58966d3259f7b37696bfc98cf460252825256f5a | |
| parent | 8312976e73fce9689ab831c1da565ec413680cff (diff) | |
| download | qemu-d1db1fa8dfcea9c62643f624f2a07d2fd375ce45.tar.gz | |
virtio-ccw: Fix unsetting of indicators.
Interpretation of the ccws to register (configuration) indicators contained
a thinko: We want to disallow reading from 0, but setting the indicator
pointer to 0 is fine.
Let's fix the handling for CCW_CMD_SET{,_CONF}_IND.
Cc: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 5f5e267558..44f5772bb2 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -328,10 +328,10 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ret = -EINVAL; break; } - indicators = ldq_phys(ccw.cda); - if (!indicators) { + if (!ccw.cda) { ret = -EFAULT; } else { + indicators = ldq_phys(ccw.cda); dev->indicators = indicators; sch->curr_status.scsw.count = ccw.count - sizeof(indicators); ret = 0; @@ -348,10 +348,10 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ret = -EINVAL; break; } - indicators = ldq_phys(ccw.cda); - if (!indicators) { + if (!ccw.cda) { ret = -EFAULT; } else { + indicators = ldq_phys(ccw.cda); dev->indicators2 = indicators; sch->curr_status.scsw.count = ccw.count - sizeof(indicators); ret = 0; |