Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 3.13 048/105] mptfusion: enable no_write_same for vmware scsi disks | Date | Mon, 27 Oct 2014 11:56:23 -0700 |
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3.13.11.10 -stable review patch. If anyone has any objections, please let me know.
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From: Chris J Arges <chris.j.arges@canonical.com>
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: Kamal Mostafa <kamal@canonical.com> --- drivers/message/fusion/mptspi.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c index 5653e50..424f51d 100644 --- a/drivers/message/fusion/mptspi.c +++ b/drivers/message/fusion/mptspi.c @@ -1422,6 +1422,11 @@ 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 -- 1.9.1
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