3.17-stable review patch. If anyone has any objections, please let me know.
------------------ From: Chris J Arges <[email protected]> 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 <[email protected]> Tested-by: Chris J Arges <[email protected]> Signed-off-by: Chris J Arges <[email protected]> Reviewed-by: Martin K. Petersen <[email protected]> Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
