diff options
| author | Wei Wang <wei.w.wang@intel.com> | 2018-12-28 10:26:26 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-01-14 20:15:19 -0500 |
| commit | a229989d975eb926076307c1f2f5e4c6111768e7 (patch) | |
| tree | d7ee69ba30271cc65a55831bd2d3b6172cc3c830 /drivers/virtio/virtio_mmio.c | |
| parent | ddbeac07a39a81d82331a312d0578fab94fccbf1 (diff) | |
| download | linux-a229989d975eb926076307c1f2f5e4c6111768e7.tar.bz2 | |
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/virtio/virtio_mmio.c')
| -rw-r--r-- | drivers/virtio/virtio_mmio.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c index 4cd9ea5c75be..d9dd0f789279 100644 --- a/drivers/virtio/virtio_mmio.c +++ b/drivers/virtio/virtio_mmio.c @@ -468,7 +468,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs, { struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev); unsigned int irq = platform_get_irq(vm_dev->pdev, 0); - int i, err; + int i, err, queue_idx = 0; err = request_irq(irq, vm_interrupt, IRQF_SHARED, dev_name(&vdev->dev), vm_dev); @@ -476,7 +476,12 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs, return err; for (i = 0; i < nvqs; ++i) { - vqs[i] = vm_setup_vq(vdev, i, callbacks[i], names[i], + if (!names[i]) { + vqs[i] = NULL; + continue; + } + + vqs[i] = vm_setup_vq(vdev, queue_idx++, callbacks[i], names[i], ctx ? ctx[i] : false); if (IS_ERR(vqs[i])) { vm_del_vqs(vdev); |