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virtio: fixes

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Some minor fixes
 
 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 fixes from Michael Tsirkin:
 "Some minor fixes"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  vringh: fix copy direction of vringh_iov_push_kern()
  vsock/virtio: remove unused 'work' field from 'struct virtio_vsock_pkt'
  virtio_ring: fix stalls for packed rings
This commit is contained in:
Linus Torvalds 2019-10-28 12:47:22 +01:00
commit 9e5eefba3d
3 changed files with 10 additions and 6 deletions
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8
drivers/vhost/vringh.c
View File

@ -852,6 +852,12 @@ static inline int xfer_kern(void *src, void *dst, size_t len)
return 0;
}
static inline int kern_xfer(void *dst, void *src, size_t len)
{
memcpy(dst, src, len);
return 0;
}
/**
* vringh_init_kern - initialize a vringh for a kernelspace vring.
* @vrh: the vringh to initialize.
@ -958,7 +964,7 @@ EXPORT_SYMBOL(vringh_iov_pull_kern);
ssize_t vringh_iov_push_kern(struct vringh_kiov *wiov,
const void *src, size_t len)
{
return vringh_iov_xfer(wiov, (void *)src, len, xfer_kern);
return vringh_iov_xfer(wiov, (void *)src, len, kern_xfer);
}
EXPORT_SYMBOL(vringh_iov_push_kern);

7
drivers/virtio/virtio_ring.c
View File

@ -1499,9 +1499,6 @@ static bool virtqueue_enable_cb_delayed_packed(struct virtqueue *_vq)
* counter first before updating event flags.
*/
virtio_wmb(vq->weak_barriers);
} else {
used_idx = vq->last_used_idx;
wrap_counter = vq->packed.used_wrap_counter;
}
if (vq->packed.event_flags_shadow == VRING_PACKED_EVENT_FLAG_DISABLE) {
@ -1518,7 +1515,9 @@ static bool virtqueue_enable_cb_delayed_packed(struct virtqueue *_vq)
*/
virtio_mb(vq->weak_barriers);
if (is_used_desc_packed(vq, used_idx, wrap_counter)) {
if (is_used_desc_packed(vq,
vq->last_used_idx,
vq->packed.used_wrap_counter)) {
END_USE(vq);
return false;
}

1
include/linux/virtio_vsock.h
View File

@ -48,7 +48,6 @@ struct virtio_vsock_sock {
struct virtio_vsock_pkt {
struct virtio_vsock_hdr hdr;
struct work_struct work;
struct list_head list;
/* socket refcnt not held, only use for cancellation */
struct vsock_sock *vsk;