mptfusion: enable no_write_same for vmware scsi disks
authorChris J Arges <chris.j.arges@canonical.com>
Tue, 23 Sep 2014 14:22:25 +0000 (09:22 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 30 Oct 2014 16:35:10 +0000 (09:35 -0700)
commite6f0636b610650b66849476f0de8663f9cf5ff15
tree1ddef9bcd21888c267876fbdaa4dc82650070f9b
parent39d6457473676ef1ceeec2f384bbabb32adbd888
mptfusion: enable no_write_same for vmware scsi disks

commit 4089b71cc820a426d601283c92fcd4ffeb5139c2 upstream.

When using a virtual SCSI disk in a VMWare VM if blkdev_issue_zeroout is used
data can be improperly zeroed out using the mptfusion driver. This patch
disables write_same for this driver and the vmware subsystem_vendor which
ensures that manual zeroing out is used instead.

BugLink: http://bugs.launchpad.net/bugs/1371591
Reported-by: Bruce Lucas <bruce.lucas@mongodb.com>
Tested-by: Chris J Arges <chris.j.arges@canonical.com>
Signed-off-by: Chris J Arges <chris.j.arges@canonical.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/message/fusion/mptspi.c