target: Don't allow setting WC emulation if device doesn't support
authorAndy Grover <agrover@redhat.com>
Wed, 14 May 2014 22:48:06 +0000 (15:48 -0700)
committerNicholas Bellinger <nab@linux-iscsi.org>
Fri, 16 May 2014 00:09:17 +0000 (17:09 -0700)
commit07b8dae38b09bcfede7e726f172e39b5ce8390d9
tree6a628397c3e6f73f0fe2d7cdf9e4c7231ddcac40
parent52d0aa7980cfee85c831b2969e659055395386d4
target: Don't allow setting WC emulation if device doesn't support

Just like for pSCSI, if the transport sets get_write_cache, then it is
not valid to enable write cache emulation for it. Return an error.

see https://bugzilla.redhat.com/show_bug.cgi?id=1082675

Reviewed-by: Chris Leech <cleech@redhat.com>
Signed-off-by: Andy Grover <agrover@redhat.com>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
drivers/target/target_core_device.c