From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S967474AbaFQWID (ORCPT ); Tue, 17 Jun 2014 18:08:03 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:54705 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966956AbaFQVv6 (ORCPT ); Tue, 17 Jun 2014 17:51:58 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Marcel Apfelbaum , Bjorn Helgaas , Kamal Mostafa Subject: [PATCH 3.13 126/212] PCI: shpchp: Check bridge's secondary (not primary) bus speed Date: Tue, 17 Jun 2014 14:43:40 -0700 Message-Id: <1403041506-13646-127-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1403041506-13646-1-git-send-email-kamal@canonical.com> References: <1403041506-13646-1-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 3.13.11.4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Marcel Apfelbaum commit 93fa9d32670f5592c8e56abc9928fc194e1e72fc upstream. When a new device is added below a hotplug bridge, the bridge's secondary bus speed and the device's bus speed must match. The shpchp driver previously checked the bridge's *primary* bus speed, not the secondary bus speed. This caused hot-add errors like: shpchp 0000:00:03.0: Speed of bus ff and adapter 0 mismatch Check the secondary bus speed instead. [bhelgaas: changelog] Link: https://bugzilla.kernel.org/show_bug.cgi?id=75251 Fixes: 3749c51ac6c1 ("PCI: Make current and maximum bus speeds part of the PCI core") Signed-off-by: Marcel Apfelbaum Signed-off-by: Bjorn Helgaas Acked-by: Michael S. Tsirkin Signed-off-by: Kamal Mostafa --- drivers/pci/hotplug/shpchp_ctrl.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c index 5849927..6efc2ec 100644 --- a/drivers/pci/hotplug/shpchp_ctrl.c +++ b/drivers/pci/hotplug/shpchp_ctrl.c @@ -282,8 +282,8 @@ static int board_added(struct slot *p_slot) return WRONG_BUS_FREQUENCY; } - bsp = ctrl->pci_dev->bus->cur_bus_speed; - msp = ctrl->pci_dev->bus->max_bus_speed; + bsp = ctrl->pci_dev->subordinate->cur_bus_speed; + msp = ctrl->pci_dev->subordinate->max_bus_speed; /* Check if there are other slots or devices on the same bus */ if (!list_empty(&ctrl->pci_dev->subordinate->devices)) -- 1.9.1