target: Allow non-supporting backends to set pi_prot_type to 0
authorAndy Grover <agrover@redhat.com>
Tue, 15 Apr 2014 21:13:12 +0000 (14:13 -0700)
committerNicholas Bellinger <nab@linux-iscsi.org>
Fri, 16 May 2014 00:08:51 +0000 (17:08 -0700)
commit448ba904160f9d8f69217c28a1692cee5afbff88
treed279470d99dc075fbb2e48b420159fddd267a596
parentd1db0eea852497762cab43b905b879dfcd3b8987
target: Allow non-supporting backends to set pi_prot_type to 0

Userspace tools assume if a value is read from configfs, it is valid
and will not cause an error if the same value is written back. The only
valid value for pi_prot_type for backends not supporting DIF is 0, so allow
this particular value to be set without returning an error.

Reported-by: Krzysztof Chojnowski <frirajder@gmail.com>
Signed-off-by: Andy Grover <agrover@redhat.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
drivers/target/target_core_device.c