Patch "mptfusion: enable no_write_same for vmware scsi disks" has been added to the 3.17-stable tree

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This is a note to let you know that I've just added the patch titled

    mptfusion: enable no_write_same for vmware scsi disks

to the 3.17-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mptfusion-enable-no_write_same-for-vmware-scsi-disks.patch
and it can be found in the queue-3.17 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 4089b71cc820a426d601283c92fcd4ffeb5139c2 Mon Sep 17 00:00:00 2001
From: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
Date: Tue, 23 Sep 2014 09:22:25 -0500
Subject: mptfusion: enable no_write_same for vmware scsi disks

From: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>

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@xxxxxxxxxxx>
Tested-by: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
Signed-off-by: Chris J Arges <chris.j.arges@xxxxxxxxxxxxx>
Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/message/fusion/mptspi.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -1419,6 +1419,11 @@ mptspi_probe(struct pci_dev *pdev, const
 		goto out_mptspi_probe;
         }
 
+	/* VMWare emulation doesn't properly implement WRITE_SAME
+	 */
+	if (pdev->subsystem_vendor == 0x15AD)
+		sh->no_write_same = 1;
+
 	spin_lock_irqsave(&ioc->FreeQlock, flags);
 
 	/* Attach the SCSI Host to the IOC structure


Patches currently in stable-queue which might be from chris.j.arges@xxxxxxxxxxxxx are

queue-3.17/mptfusion-enable-no_write_same-for-vmware-scsi-disks.patch
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