[PATCH] vhost: add mutex_lock/unlock for vhost_vq_reset
DORMANTno replies
From: Jia He <hidden>
Date: 2020-04-30 02:41:52
Also in:
kvm, lkml, virtualization
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
vq->mutex is to protect any vq accessing, hence adding mutex_lock/unlock makes sense to avoid potential race condition. Signed-off-by: Jia He <redacted> --- drivers/vhost/vhost.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index d450e16c5c25..622bfba2e5ab 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c@@ -297,6 +297,7 @@ static void vhost_vq_meta_reset(struct vhost_dev *d) static void vhost_vq_reset(struct vhost_dev *dev, struct vhost_virtqueue *vq) { + mutex_lock(&vq->mutex); vq->num = 1; vq->desc = NULL; vq->avail = NULL;
@@ -323,6 +324,7 @@ static void vhost_vq_reset(struct vhost_dev *dev, vq->umem = NULL; vq->iotlb = NULL; __vhost_vq_meta_reset(vq); + mutex_unlock(&vq->mutex); } static int vhost_worker(void *data)
--
2.17.1