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virtio, vhost: last minute fixes 

ARM DMA fix revert
 vhost endian-ness fix
 MAINTAINERS: email address change for Amit
 
 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/vhost fixes from Michael S. Tsirkin:
 "Last minute fixes:

   - ARM DMA fix revert

   - vhost endian-ness fix

   - MAINTAINERS: email address change for Amit"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  MAINTAINERS: update email address for Amit Shah
  vhost: fix initialization for vq->is_le
  Revert "vring: Force use of DMA API for ARM-based systems with legacy devices"
This commit is contained in:
Linus Torvalds 2017-02-03 15:43:30 -08:00
parent e9f7f17d53 79134d11d0
commit a49e6f584e
3 changed files with 5 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
MAINTAINERS
View File

@ -13065,7 +13065,7 @@ F: drivers/input/serio/userio.c
F: include/uapi/linux/userio.h
VIRTIO CONSOLE DRIVER
M: Amit Shah <amit.shah@redhat.com>
M: Amit Shah <amit@kernel.org>
L: virtualization@lists.linux-foundation.org
S: Maintained
F: drivers/char/virtio_console.c

10
drivers/vhost/vhost.c
View File

@ -130,14 +130,14 @@ static long vhost_get_vring_endian(struct vhost_virtqueue *vq, u32 idx,
static void vhost_init_is_le(struct vhost_virtqueue *vq)
{
if (vhost_has_feature(vq, VIRTIO_F_VERSION_1))
vq->is_le = true;
vq->is_le = vhost_has_feature(vq, VIRTIO_F_VERSION_1)
|| virtio_legacy_is_little_endian();
}
#endif /* CONFIG_VHOST_CROSS_ENDIAN_LEGACY */
static void vhost_reset_is_le(struct vhost_virtqueue *vq)
{
vq->is_le = virtio_legacy_is_little_endian();
vhost_init_is_le(vq);
}
struct vhost_flush_struct {
@ -1714,10 +1714,8 @@ int vhost_vq_init_access(struct vhost_virtqueue *vq)
int r;
bool is_le = vq->is_le;
if (!vq->private_data) {
vhost_reset_is_le(vq);
if (!vq->private_data)
return 0;
}
vhost_init_is_le(vq);

7
drivers/virtio/virtio_ring.c
View File

@ -159,13 +159,6 @@ static bool vring_use_dma_api(struct virtio_device *vdev)
if (xen_domain())
return true;
/*
* On ARM-based machines, the DMA ops will do the right thing,
* so always use them with legacy devices.
*/
if (IS_ENABLED(CONFIG_ARM) || IS_ENABLED(CONFIG_ARM64))
return !virtio_has_feature(vdev, VIRTIO_F_VERSION_1);
return false;
}