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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-22 16:28:18 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-22 16:28:18 -0700 |
| commit | 18a3c5f7abfdf97f88536d35338ebbee119c355c (patch) | |
| tree | 811d3750b18ee6f43b2100b664330e25f9d4f0e6 /drivers/vhost/vdpa.c | |
| parent | 90c911ad7445ccec9936763f05fa5db6a3da53be (diff) | |
| parent | be286f84e33da1a7f83142b64dbd86f600e73363 (diff) | |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes from Michael Tsirkin:
"Very late in the cycle but both risky if left unfixed and more or less
obvious.."
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vdpa/mlx5: Set err = -ENOMEM in case dma_map_sg_attrs fails
vhost-vdpa: protect concurrent access to vhost device iotlb
Diffstat (limited to 'drivers/vhost/vdpa.c')
| -rw-r--r-- | drivers/vhost/vdpa.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index e0a27e336293..bfa4c6ef554e 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -745,9 +745,11 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, const struct vdpa_config_ops *ops = vdpa->config; int r = 0; + mutex_lock(&dev->mutex); + r = vhost_dev_check_owner(dev); if (r) - return r; + goto unlock; switch (msg->type) { case VHOST_IOTLB_UPDATE: @@ -768,6 +770,8 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, r = -EINVAL; break; } +unlock: + mutex_unlock(&dev->mutex); return r; } |