[RFC v4 02/11] vhost-vdpa: protect concurrent access to vhost device iotlb
From: Xie Yongji <hidden>
Date: 2021-02-23 11:55:14
Also in:
linux-fsdevel, netdev
Subsystem:
the rest, virtio host (vhost) · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
Use vhost_dev->mutex to protect vhost device iotlb from
concurrent access.
Fixes: 4c8cf318("vhost: introduce vDPA-based backend")
Signed-off-by: Xie Yongji <redacted>
---
drivers/vhost/vdpa.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index c50079dfb281..5500e3bf05c1 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c@@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, if (r) return r; + mutex_lock(&dev->mutex); switch (msg->type) { case VHOST_IOTLB_UPDATE: r = vhost_vdpa_process_iotlb_update(v, msg);
@@ -742,6 +743,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, r = -EINVAL; break; } + mutex_unlock(&dev->mutex); return r; }
--
2.11.0