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Commit 4089b71c authored by Chris J Arges's avatar Chris J Arges Committed by Christoph Hellwig
Browse files

mptfusion: enable no_write_same for vmware scsi disks 

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.

Cc: stable@vger.kernel.org
BugLink: http://bugs.launchpad.net/bugs/1371591


Reported-by: default avatarBruce Lucas <bruce.lucas@mongodb.com>
Tested-by: default avatarChris J Arges <chris.j.arges@canonical.com>
Signed-off-by: default avatarChris J Arges <chris.j.arges@canonical.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 859c75ab

drivers/message/fusion/mptspi.c

+5 −0
Original line number Diff line number Diff line
@@ -1419,6 +1419,11 @@ mptspi_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
		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