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virtio: a last minute regression fix

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I thought we did a lot of testing, but a regression still
 managed to sneak in. The fix seems trivial.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio fix from Michael Tsirkin:
 "A last minute regression fix.

  I thought we did a lot of testing, but a regression still managed to
  sneak in. The fix seems trivial"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vhost: allow batching hint without size
This commit is contained in:
Linus Torvalds 2022-03-14 11:21:52 -07:00
commit 6665ca1574
1 changed files with 3 additions and 1 deletions
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4
drivers/vhost/vhost.c
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@ -1170,7 +1170,9 @@ ssize_t vhost_chr_write_iter(struct vhost_dev *dev,
goto done;
}
if (msg.size == 0) {
if ((msg.type == VHOST_IOTLB_UPDATE ||
msg.type == VHOST_IOTLB_INVALIDATE) &&
msg.size == 0) {
ret = -EINVAL;
goto done;
}