From patchwork Mon Sep 12 21:09:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 9328105 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 105146077F for ; Mon, 12 Sep 2016 21:10:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EEA4F28A7B for ; Mon, 12 Sep 2016 21:10:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DE43D28ED1; Mon, 12 Sep 2016 21:10:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4497828A7B for ; Mon, 12 Sep 2016 21:10:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757507AbcILVJk (ORCPT ); Mon, 12 Sep 2016 17:09:40 -0400 Received: from mail.kernel.org ([198.145.29.136]:54390 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757497AbcILVJh (ORCPT ); Mon, 12 Sep 2016 17:09:37 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 0C71A20412; Mon, 12 Sep 2016 21:09:31 +0000 (UTC) Received: from localhost (unknown [69.71.1.1]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id E44F32041D; Mon, 12 Sep 2016 21:09:29 +0000 (UTC) Subject: [PATCH v2 5/8] PCI: pciehp: Don't re-read Slot Status when handling surprise event To: Mayurkumar Patel From: Bjorn Helgaas Cc: Rajat Jain , MikaWesterberg@linux.intel.com, linux-pci@vger.kernel.org, Rafael J Wysocki , linux-kernel@vger.kernel.org, Keith Busch , Luis Antonio Tarazona-Duarte , Andy Shevchenko , mika.westerberg@linux.intel.com Date: Mon, 12 Sep 2016 16:09:28 -0500 Message-ID: <20160912210928.22258.74566.stgit@bhelgaas-glaptop2.roam.corp.google.com> In-Reply-To: <20160912210507.22258.63097.stgit@bhelgaas-glaptop2.roam.corp.google.com> References: <20160912210507.22258.63097.stgit@bhelgaas-glaptop2.roam.corp.google.com> User-Agent: StGit/0.16 MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mayurkumar Patel Previously we read Slot Status when handling a surprise event. But Slot Status might have changed since we identified the event, and the event_type already tells us whether to enable or disable the slot, so there's no need to read it again. Remove handle_surprise_event() and queue the power work directly. [bhelgaas: changelog] Signed-off-by: Mayurkumar Patel Signed-off-by: Bjorn Helgaas Acked-by: Rajat Jain --- drivers/pci/hotplug/pciehp_ctrl.c | 18 ++---------------- 1 file changed, 2 insertions(+), 16 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c index 7ea3e61..a787684 100644 --- a/drivers/pci/hotplug/pciehp_ctrl.c +++ b/drivers/pci/hotplug/pciehp_ctrl.c @@ -302,20 +302,6 @@ static void handle_button_press_event(struct slot *p_slot) /* * Note: This function must be called with slot->lock held */ -static void handle_surprise_event(struct slot *p_slot) -{ - u8 getstatus; - - pciehp_get_adapter_status(p_slot, &getstatus); - if (!getstatus) - pciehp_queue_power_work(p_slot, DISABLE_REQ); - else - pciehp_queue_power_work(p_slot, ENABLE_REQ); -} - -/* - * Note: This function must be called with slot->lock held - */ static void handle_link_event(struct slot *p_slot, u32 event) { struct controller *ctrl = p_slot->ctrl; @@ -378,14 +364,14 @@ static void interrupt_event_handler(struct work_struct *work) pciehp_green_led_off(p_slot); break; case INT_PRESENCE_ON: - handle_surprise_event(p_slot); + pciehp_queue_power_work(p_slot, ENABLE_REQ); break; case INT_PRESENCE_OFF: /* * Regardless of surprise capability, we need to * definitely remove a card that has been pulled out! */ - handle_surprise_event(p_slot); + pciehp_queue_power_work(p_slot, DISABLE_REQ); break; case INT_LINK_UP: case INT_LINK_DOWN: