From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753566AbaJ0TDz (ORCPT ); Mon, 27 Oct 2014 15:03:55 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:52793 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752563AbaJ0TDw (ORCPT ); Mon, 27 Oct 2014 15:03:52 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Chris J Arges , Christoph Hellwig , 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 Message-Id: <1414436240-13879-49-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1414436240-13879-1-git-send-email-kamal@canonical.com> References: <1414436240-13879-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.13.11.10 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Chris J Arges 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 Tested-by: Chris J Arges Signed-off-by: Chris J Arges Reviewed-by: Martin K. Petersen Signed-off-by: Christoph Hellwig Signed-off-by: Kamal Mostafa --- 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