UPSTREAM: arm: missing checks of __get_user()/__put_user() return values

(cherry pick from commit 7f1b5a9966b176e10d6cd322324a82be2379a51b)

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Bug: 9674955
Bug: 25773781
Change-Id: I0bed5e1b77e1309747a963719a12f20b47cd2703
1 file changed