diff options
| author | Halil Pasic <pasic@linux.ibm.com> | 2018-05-16 15:27:57 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2018-06-18 10:50:32 +0200 |
| commit | 7a5342e7ccf2deb5553951024d57ec1327c926dd (patch) | |
| tree | 52898c95867579df071295a37a720e4839483ada /hw/s390x | |
| parent | 2ef2f16781af9dee6ba6517755e9073ba5799fa2 (diff) | |
| download | qemu-7a5342e7ccf2deb5553951024d57ec1327c926dd.zip qemu-7a5342e7ccf2deb5553951024d57ec1327c926dd.tar.gz qemu-7a5342e7ccf2deb5553951024d57ec1327c926dd.tar.bz2 | |
virtio-ccw: clean up notify
Coverity recently started complaining about virtio_ccw_notify(). Turns
out, there is a couple of things that can be cleaned up. Let's clean!
Reported-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: CID 1390619
Signed-off-by: Halil Pasic <pasic@linux.ibm.com>
Message-Id: <20180516132757.68558-1-pasic@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'hw/s390x')
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 0a9bec4..b92a85d 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -1001,10 +1001,15 @@ static void virtio_ccw_notify(DeviceState *d, uint16_t vector) SubchDev *sch = ccw_dev->sch; uint64_t indicators; - /* queue indicators + secondary indicators */ - if (vector >= VIRTIO_QUEUE_MAX + 64) { + if (vector == VIRTIO_NO_VECTOR) { return; } + /* + * vector < VIRTIO_QUEUE_MAX: notification for a virtqueue + * vector == VIRTIO_QUEUE_MAX: configuration change notification + * bits beyond that are unused and should never be notified for + */ + assert(vector <= VIRTIO_QUEUE_MAX); if (vector < VIRTIO_QUEUE_MAX) { if (!dev->indicators) { @@ -1027,6 +1032,7 @@ static void virtio_ccw_notify(DeviceState *d, uint16_t vector) css_adapter_interrupt(CSS_IO_ADAPTER_VIRTIO, dev->thinint_isc); } } else { + assert(vector < NR_CLASSIC_INDICATOR_BITS); indicators = address_space_ldq(&address_space_memory, dev->indicators->addr, MEMTXATTRS_UNSPECIFIED, @@ -1040,12 +1046,11 @@ static void virtio_ccw_notify(DeviceState *d, uint16_t vector) if (!dev->indicators2) { return; } - vector = 0; indicators = address_space_ldq(&address_space_memory, dev->indicators2->addr, MEMTXATTRS_UNSPECIFIED, NULL); - indicators |= 1ULL << vector; + indicators |= 1ULL; address_space_stq(&address_space_memory, dev->indicators2->addr, indicators, MEMTXATTRS_UNSPECIFIED, NULL); css_conditional_io_interrupt(sch); |