Nicholas Bellinger d2bdbee0d9
target/iblock: Fix WCE=1 + DPOFUA=1 backend WRITE regression ...
This patch fixes a regression bug introduced in v3.9-rc1 where if the
underlying struct block_device for a IBLOCK backend is configured with
WCE=1 + DPOFUA=1 settings, the rw = WRITE assignment no longer occurs
in iblock_execute_rw(), and rw = 0 is passed to iblock_submit_bios()
in effect causing a READ bio operation to occur.
The offending commit is:
commit d0c8b259f8nab@linux-iscsi.org >
Date: Tue Jan 29 22:10:06 2013 -0800
target/iblock: Use backend REQ_FLUSH hint for WriteCacheEnabled status
Note the WCE=1 + DPOFUA=0, WCE=0 + DPOFUA=1, and WCE=0 + DPOFUA=0 cases
are not affected by this regression bug.
Reported-by: Chris Boot <bootc@bootc.net >
Tested-by: Chris Boot <bootc@bootc.net >
Reported-by: Hannes Reinecke <hare@suse.de >
Cc: <stable@vger.kernel.org >
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org >
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