From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from out1-smtp.messagingengine.com ([66.111.4.25]:41459 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932344AbdIGOvs (ORCPT ); Thu, 7 Sep 2017 10:51:48 -0400 Subject: FAILED: patch "[PATCH] ahci: don't use MSI for devices with the silly Intel NVMe" failed to apply to 4.9-stable tree To: hch@lst.de, john.robert.loy@gmail.com, tj@kernel.org Cc: From: Date: Thu, 07 Sep 2017 16:51:00 +0200 Message-ID: <150479586081164@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >>From f723fa4e69920f6a5dd5fa0d10ce90e2f14d189c Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 5 Sep 2017 18:46:47 +0200 Subject: [PATCH] ahci: don't use MSI for devices with the silly Intel NVMe remapping scheme Intel AHCI controllers that also hide NVMe devices in their bar can't use MSI interrupts, so disable them. Reported-by: John Loy Tested-by: John Loy Signed-off-by: Christoph Hellwig Fixes: d684a90d38e2 ("ahci: per-port msix support") Cc: stable@vger.kernel.org # v4.5+ Signed-off-by: Tejun Heo diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c index 5a5fd0b404eb..cb9b0e9090e3 100644 --- a/drivers/ata/ahci.c +++ b/drivers/ata/ahci.c @@ -1469,7 +1469,14 @@ static void ahci_remap_check(struct pci_dev *pdev, int bar, return; dev_warn(&pdev->dev, "Found %d remapped NVMe devices.\n", count); - dev_warn(&pdev->dev, "Switch your BIOS from RAID to AHCI mode to use them.\n"); + dev_warn(&pdev->dev, + "Switch your BIOS from RAID to AHCI mode to use them.\n"); + + /* + * Don't rely on the msi-x capability in the remap case, + * share the legacy interrupt across ahci and remapped devices. + */ + hpriv->flags |= AHCI_HFLAG_NO_MSI; } static int ahci_get_irq_vector(struct ata_host *host, int port)