From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:46650 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751928AbdIVLby (ORCPT ); Fri, 22 Sep 2017 07:31:54 -0400 Subject: Patch "PCI: shpchp: Enable bridge bus mastering if MSI is enabled" has been added to the 3.18-stable tree To: zuban32s@gmail.com, bhelgaas@google.com, gregkh@linuxfoundation.org, marcel@redhat.com, mst@redhat.com Cc: , From: Date: Fri, 22 Sep 2017 13:32:02 +0200 Message-ID: <15060799225790@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: This is a note to let you know that I've just added the patch titled PCI: shpchp: Enable bridge bus mastering if MSI is enabled to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-shpchp-enable-bridge-bus-mastering-if-msi-is-enabled.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 48b79a14505349a29b3e20f03619ada9b33c4b17 Mon Sep 17 00:00:00 2001 From: Aleksandr Bezzubikov Date: Tue, 18 Jul 2017 17:12:25 +0300 Subject: PCI: shpchp: Enable bridge bus mastering if MSI is enabled From: Aleksandr Bezzubikov commit 48b79a14505349a29b3e20f03619ada9b33c4b17 upstream. An SHPC may generate MSIs to notify software about slot or controller events (SHPC spec r1.0, sec 4.7). A PCI device can only generate an MSI if it has bus mastering enabled. Enable bus mastering if the bridge contains an SHPC that uses MSI for event notifications. Signed-off-by: Aleksandr Bezzubikov [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas Reviewed-by: Marcel Apfelbaum Acked-by: Michael S. Tsirkin Signed-off-by: Greg Kroah-Hartman --- drivers/pci/hotplug/shpchp_hpc.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/pci/hotplug/shpchp_hpc.c +++ b/drivers/pci/hotplug/shpchp_hpc.c @@ -1062,6 +1062,8 @@ int shpc_init(struct controller *ctrl, s if (rc) { ctrl_info(ctrl, "Can't get msi for the hotplug controller\n"); ctrl_info(ctrl, "Use INTx for the hotplug controller\n"); + } else { + pci_set_master(pdev); } rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED, Patches currently in stable-queue which might be from zuban32s@gmail.com are queue-3.18/pci-shpchp-enable-bridge-bus-mastering-if-msi-is-enabled.patch