path: root/drivers/message
diff options
authorChris J Arges <chris.j.arges@canonical.com>2014-09-23 09:22:25 -0500
committerChristoph Hellwig <hch@lst.de>2014-09-25 14:24:48 +0200
commit4089b71cc820a426d601283c92fcd4ffeb5139c2 (patch)
treeadeb050dc033a2ec53b32b899eca03930377848a /drivers/message
parent859c75aba20264d87dd026bab0d0ca3bff385955 (diff)
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: 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>
Diffstat (limited to 'drivers/message')
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 787933d43d32..613231c16194 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -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

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