From patchwork Fri Aug 18 14:57:57 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 9909385 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 4D63B602C8 for ; Fri, 18 Aug 2017 15:03:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 479EF28505 for ; Fri, 18 Aug 2017 15:03:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3C68E28953; Fri, 18 Aug 2017 15:03:00 +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=-7.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, RCVD_IN_DNSWL_HI autolearn=unavailable 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 D321C28505 for ; Fri, 18 Aug 2017 15:02:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752572AbdHRPCp (ORCPT ); Fri, 18 Aug 2017 11:02:45 -0400 Received: from fllnx210.ext.ti.com ([198.47.19.17]:19583 "EHLO fllnx210.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752204AbdHRO6n (ORCPT ); Fri, 18 Aug 2017 10:58:43 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by fllnx210.ext.ti.com (8.15.1/8.15.1) with ESMTP id v7IEwcMq007559; Fri, 18 Aug 2017 09:58:38 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1503068318; bh=k3rKXzZcCVcNr6kT1pu3mg+aA8XcznWbkqB7CAvhhUo=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=t1MOUINaJkPfcO8yKRJjIyk+aPpCNhQI8iZXtm66xdyTBe2EEVo6CD0gX9BPBKpBq z02851MQyevaqx0HZge1x9e2tEjpf4bfjffAqm8pXOI36RUQadaLtNhnhotEDvP2q2 ajlTP4UW5nhyRTx9vjDumT948cXuBwtZfJlM9jQw= Received: from DFLE107.ent.ti.com (dfle107.ent.ti.com [10.64.6.28]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id v7IEwcLW002831; Fri, 18 Aug 2017 09:58:38 -0500 Received: from DFLE113.ent.ti.com (10.64.6.34) by DFLE107.ent.ti.com (10.64.6.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.845.34; Fri, 18 Aug 2017 09:58:38 -0500 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE113.ent.ti.com (10.64.6.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.845.34; Fri, 18 Aug 2017 09:58:37 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.845.34 via Frontend Transport; Fri, 18 Aug 2017 09:58:37 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id v7IEwKk3023721; Fri, 18 Aug 2017 09:58:35 -0500 From: Kishon Vijay Abraham I To: Bjorn Helgaas CC: Joao Pinto , Arnd Bergmann , , , , , , Subject: [PATCH 05/18] PCI: endpoint: functions/pci-epf-test: Add "volatile" to pci_epf_test_reg Date: Fri, 18 Aug 2017 20:27:57 +0530 Message-ID: <20170818145810.17649-6-kishon@ti.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170818145810.17649-1-kishon@ti.com> References: <20170818145810.17649-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 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 struct pci_epf_test_reg is the MEMSPACE of pci-epf-test function driver that will be accessed by the "host" for programming the pci-epf-test device. So this structure shouldn't be subjected to compiler optimization in pci_epf_test_cmd_handler() since the values can be changed by code outside the scope of current code at any time. Signed-off-by: Kishon Vijay Abraham I Signed-off-by: Sekhar Nori --- drivers/pci/endpoint/functions/pci-epf-test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/functions/pci-epf-test.c b/drivers/pci/endpoint/functions/pci-epf-test.c index 53fff8030337..5cbc05a0762d 100644 --- a/drivers/pci/endpoint/functions/pci-epf-test.c +++ b/drivers/pci/endpoint/functions/pci-epf-test.c @@ -267,7 +267,7 @@ static void pci_epf_test_cmd_handler(struct work_struct *work) cmd_handler.work); struct pci_epf *epf = epf_test->epf; struct pci_epc *epc = epf->epc; - struct pci_epf_test_reg *reg = epf_test->reg[0]; + volatile struct pci_epf_test_reg *reg = epf_test->reg[0]; if (!reg->command) goto reset_handler;