Commit de2b3eea authored by Jiang Liu's avatar Jiang Liu Committed by Alex Williamson
Browse files

VFIO: use ACCESS_ONCE() to guard access to dev->driver

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: default avatarJiang Liu <>
Signed-off-by: default avatarAlex Williamson <>
parent 9df7b25a
......@@ -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);
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