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:Jiang Liu <jiang.liu@huawei.com> Signed-off-by:
Alex Williamson <alex.williamson@redhat.com>
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