The assignment dev = dev is redundant and should be removed.

Detected by CoverityScan, CID#1469486 ("Evaluation order violation")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NAlexei Starovoitov <ast@kernel.org>