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virtio_ring: let virtqueue_{kick()/notify()} return a bool

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virtqueue_{kick()/notify()} should exploit the new host notification API.
If the notify call returned with a negative value the host kick failed
(e.g. a kick triggered after a device was hot-unplugged). In this case
the virtqueue is set to 'broken' and false is returned, otherwise true.

Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Heinz Graalfs
2013-10-29 09:39:48 +10:30
committed by Rusty Russell
parent 46f9c2b925
commit 5b1bf7cb67
2 changed files with 18 additions and 6 deletions
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4
include/linux/virtio.h
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@@ -51,11 +51,11 @@ int virtqueue_add_sgs(struct virtqueue *vq,
void *data,
gfp_t gfp);
void virtqueue_kick(struct virtqueue *vq);
bool virtqueue_kick(struct virtqueue *vq);
bool virtqueue_kick_prepare(struct virtqueue *vq);
void virtqueue_notify(struct virtqueue *vq);
bool virtqueue_notify(struct virtqueue *vq);
void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);