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vdpa: Modify get_vq_state() to return error code

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Modify get_vq_state() so it returns an error code. In case of hardware
acceleration, the available index may be retrieved from the device, an
operation that can possibly fail.

Reviewed-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Eli Cohen <eli@mellanox.com>
Link: https://lore.kernel.org/r/20200804162048.22587-9-eli@mellanox.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eli Cohen
2020-08-04 19:20:44 +03:00
committed by Michael S. Tsirkin
parent aac50c0bd4
commit 23750e39d5
4 changed files with 12 additions and 7 deletions
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4
include/linux/vdpa.h
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@@ -193,8 +193,8 @@ struct vdpa_config_ops {
bool (*get_vq_ready)(struct vdpa_device *vdev, u16 idx);
int (*set_vq_state)(struct vdpa_device *vdev, u16 idx,
const struct vdpa_vq_state *state);
void (*get_vq_state)(struct vdpa_device *vdev, u16 idx,
struct vdpa_vq_state *state);
int (*get_vq_state)(struct vdpa_device *vdev, u16 idx,
struct vdpa_vq_state *state);
struct vdpa_notification_area
(*get_vq_notification)(struct vdpa_device *vdev, u16 idx);
/* vq irq is not expected to be changed once DRIVER_OK is set */