From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 36AC8C4360F for ; Tue, 2 Apr 2019 13:45:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05B442133D for ; Tue, 2 Apr 2019 13:45:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731938AbfDBNpf (ORCPT ); Tue, 2 Apr 2019 09:45:35 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:43358 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731461AbfDBNkH (ORCPT ); Tue, 2 Apr 2019 09:40:07 -0400 Received: from [167.98.27.226] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hBJe0-0002os-LG; Tue, 02 Apr 2019 14:40:04 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hBJdx-0004vg-5a; Tue, 02 Apr 2019 14:40:01 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Martin K. Petersen" , "Shivasharan S" Date: Tue, 02 Apr 2019 14:38:27 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 65/99] scsi: megaraid_sas: Use 63-bit DMA addressing In-Reply-To: X-SA-Exim-Connect-IP: 167.98.27.226 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.65-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Shivasharan S commit 894169db12463cea08d0e2a9e35f42b291340e5a upstream. Although MegaRAID controllers support 64-bit DMA addressing, as per hardware design, DMA address with all 64-bits set (0xFFFFFFFF-FFFFFFFF) results in a firmware fault. Driver will set 63-bit DMA mask to ensure the above address will not be used. Signed-off-by: Shivasharan S Signed-off-by: Martin K. Petersen [bwh: Backported to 3.16: Only one instance of a 64-bit mask needs changing] Signed-off-by: Ben Hutchings --- --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -4592,7 +4592,7 @@ megasas_set_dma_mask(struct pci_dev *pde * All our contollers are capable of performing 64-bit DMA */ if (IS_DMA64) { - if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) != 0) { + if (pci_set_dma_mask(pdev, DMA_BIT_MASK(63)) != 0) { if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) != 0) goto fail_set_dma_mask;