diff options
| author | Wei Wang <wei.w.wang@intel.com> | 2018-12-28 05:26:26 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-01-15 04:15:19 +0300 |
| commit | a229989d975eb926076307c1f2f5e4c6111768e7 (patch) | |
| tree | d7ee69ba30271cc65a55831bd2d3b6172cc3c830 /drivers/s390/virtio | |
| parent | ddbeac07a39a81d82331a312d0578fab94fccbf1 (diff) | |
| download | linux-a229989d975eb926076307c1f2f5e4c6111768e7.tar.xz | |
virtio: don't allocate vqs when names[i] = NULL
Some vqs may not need to be allocated when their related feature bits
are disabled. So callers may pass in such vqs with "names = NULL".
Then we skip such vq allocations.
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Cc: stable@vger.kernel.org
Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")
Diffstat (limited to 'drivers/s390/virtio')
| -rw-r--r-- | drivers/s390/virtio/virtio_ccw.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c index fc9dbad476c0..ae1d56da671d 100644 --- a/drivers/s390/virtio/virtio_ccw.c +++ b/drivers/s390/virtio/virtio_ccw.c @@ -635,7 +635,7 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs, { struct virtio_ccw_device *vcdev = to_vc_device(vdev); unsigned long *indicatorp = NULL; - int ret, i; + int ret, i, queue_idx = 0; struct ccw1 *ccw; ccw = kzalloc(sizeof(*ccw), GFP_DMA | GFP_KERNEL); @@ -643,8 +643,14 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs, return -ENOMEM; for (i = 0; i < nvqs; ++i) { - vqs[i] = virtio_ccw_setup_vq(vdev, i, callbacks[i], names[i], - ctx ? ctx[i] : false, ccw); + if (!names[i]) { + vqs[i] = NULL; + continue; + } + + vqs[i] = virtio_ccw_setup_vq(vdev, queue_idx++, callbacks[i], + names[i], ctx ? ctx[i] : false, + ccw); if (IS_ERR(vqs[i])) { ret = PTR_ERR(vqs[i]); vqs[i] = NULL; |