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| author | Krishna Kumar <krkumar2@in.ibm.com> | 2011-10-05 11:08:59 +0530 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2011-11-02 11:41:01 +1030 |
| commit | 005b20a8e0f587a46a00910ba4507bb9f6da70ea (patch) | |
| tree | b15122f5bcbb4f574286c9fea3251339caa5b5e2 /drivers | |
| parent | 5e38483b350405542c8080134408fd8897394ba2 (diff) | |
| download | linux-005b20a8e0f587a46a00910ba4507bb9f6da70ea.tar.gz linux-005b20a8e0f587a46a00910ba4507bb9f6da70ea.tar.bz2 linux-005b20a8e0f587a46a00910ba4507bb9f6da70ea.zip | |
virtio: Dont add "config" to list for !per_vq_vector
For the MSI but non-per_vq_vector case, the config/change vq
also gets added to the list of vqs that need to process the
MSI interrupt. This is not needed as config has it's own
handler (vp_config_changed). In any case, vring_interrupt()
finds nothing needs to be done on this vq.
I tested this patch by testing the "Fallback:" and "Finally
fall back" cases in vp_find_vqs(). Please review.
Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/virtio/virtio_pci.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index 4bcc8b82640b..79a31e5b4b68 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -415,9 +415,13 @@ static struct virtqueue *setup_vq(struct virtio_device *vdev, unsigned index, } } - spin_lock_irqsave(&vp_dev->lock, flags); - list_add(&info->node, &vp_dev->virtqueues); - spin_unlock_irqrestore(&vp_dev->lock, flags); + if (callback) { + spin_lock_irqsave(&vp_dev->lock, flags); + list_add(&info->node, &vp_dev->virtqueues); + spin_unlock_irqrestore(&vp_dev->lock, flags); + } else { + INIT_LIST_HEAD(&info->node); + } return vq; |