From: Chris J Arges <chris.j.ar...@canonical.com> This patch has been added to the 3.12 stable tree. If you have any objections, please let us know.
=============== 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.lu...@mongodb.com> Tested-by: Chris J Arges <chris.j.ar...@canonical.com> Signed-off-by: Chris J Arges <chris.j.ar...@canonical.com> Reviewed-by: Martin K. Petersen <martin.peter...@oracle.com> Signed-off-by: Christoph Hellwig <h...@lst.de> Signed-off-by: Jiri Slaby <jsl...@suse.cz> --- 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 5653e505f91f..424f51d1e2ce 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 -- 2.1.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
