diff options
| author | Chris J Arges <chris.j.arges@canonical.com> | 2014-09-23 09:22:25 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-10-30 09:43:07 -0700 |
| commit | f5fba53e0a6a8e3e2d287fa08dc83366f81e1526 (patch) | |
| tree | 830ecfd0561fe2b82383dc99833e34d9a3750b04 | |
| parent | 17b48b83ce69a3f9e934c0dad178a79a9277b738 (diff) | |
mptfusion: enable no_write_same for vmware scsi disks
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/message/fusion/mptspi.c | 5 |
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 |