lkml.org 
[lkml]   [2020]   [Apr]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] vhost: add mutex_lock/unlock for vhost_vq_reset
Date
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 <justin.he@arm.com>
---
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
\
 
 \ /
  Last update: 2020-04-30 04:43    [W:0.255 / U:0.284 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site