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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)
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>

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