| Message ID | 1352997798-18891-2-git-send-email-jiang.liu@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c index 3359ec2..0090212 100644 --- a/drivers/vfio/vfio.c +++ b/drivers/vfio/vfio.c @@ -465,8 +465,9 @@ static int vfio_dev_viable(struct device *dev, void *data) { struct vfio_group *group = data; struct vfio_device *device; + struct device_driver *drv = ACCESS_ONCE(dev->driver); - if (!dev->driver || vfio_whitelisted_driver(dev->driver)) + if (!drv || vfio_whitelisted_driver(drv)) return 0; device = vfio_group_get_device(group, dev);
Comments from dev_driver_string(), /* dev->driver can change to NULL underneath us because of unbinding, * so be careful about accessing it. */ So use ACCESS_ONCE() to guard access to dev->driver field. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> --- drivers/vfio/vfio.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)