github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-11-06 21:58:01 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

virtio_ring: reset IN_ORDER state in virtqueue_init()

Browse Source 
The IN_ORDER feature uses additional software state to track the next
available descriptor and in-flight descriptor batches.

virtqueue_init() resets the common virtqueue state, but free_head and
batch_last.id are initialized only when the virtqueue is created. When
an IN_ORDER virtqueue is reset, these fields can retain state from the
previous queue instance.

Reset free_head and invalidate batch_last when initializing an IN_ORDER
virtqueue. Keep this in virtqueue_init() so the state is initialized
consistently for both newly created and reset virtqueues.

Fixes: f6a15d8549 ("virtio_ring: add in order support")
Signed-off-by: Li RongQing <lirongqing@baidu.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260910123903.1717-1-lirongqing@baidu.com>
This commit is contained in:
Li RongQing 2026-09-10 20:39:03 +08:00 committed by Michael S. Tsirkin
parent 62b0a9b11e
commit d7825623a9
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/virtio/virtio_ring.c
View File

@ -559,6 +559,11 @@ static void virtqueue_init(struct vring_virtqueue *vq, u32 num)
vq->in_use = false;
vq->last_add_time_valid = false;
#endif
if (virtqueue_is_in_order(vq)) {
vq->free_head = 0;
vq->batch_last.id = UINT_MAX;
}
}