From patchwork Tue Aug 3 10:01:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 12415807 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1672DC4338F for ; Tue, 3 Aug 2021 10:02:19 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D9C7E60F9C for ; Tue, 3 Aug 2021 10:02:18 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D9C7E60F9C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.163358.299262 (Exim 4.92) (envelope-from ) id 1mArFN-0001qj-W1; Tue, 03 Aug 2021 10:02:05 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 163358.299262; Tue, 03 Aug 2021 10:02:05 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mArFN-0001qc-T2; Tue, 03 Aug 2021 10:02:05 +0000 Received: by outflank-mailman (input) for mailman id 163358; Tue, 03 Aug 2021 10:02:05 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mArFN-0001qW-Fi for xen-devel@lists.xenproject.org; Tue, 03 Aug 2021 10:02:05 +0000 Received: from metis.ext.pengutronix.de (unknown [2001:67c:670:201:290:27ff:fe1d:cc33]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 763a323c-6016-4e8a-86a3-23483677accb; Tue, 03 Aug 2021 10:02:03 +0000 (UTC) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mArFF-0002yK-1Z; Tue, 03 Aug 2021 12:01:57 +0200 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mArFB-0006FC-Q0; Tue, 03 Aug 2021 12:01:53 +0200 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1mArFB-0002mx-P3; Tue, 03 Aug 2021 12:01:53 +0200 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 763a323c-6016-4e8a-86a3-23483677accb From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Bjorn Helgaas Cc: kernel@pengutronix.de, Greg Kroah-Hartman , linux-pci@vger.kernel.org, Konrad Rzeszutek Wilk , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , xen-devel@lists.xenproject.org Subject: [PATCH v2 3/6] xen/pci: Drop some checks that are always true Date: Tue, 3 Aug 2021 12:01:47 +0200 Message-Id: <20210803100150.1543597-4-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210803100150.1543597-1-u.kleine-koenig@pengutronix.de> References: <20210803100150.1543597-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Patch-Hashes: v=1; h=sha256; i=7QOFRnoxyPrPqaGt2Yf8oJvx3xwgCvlMdm130sPrxr8=; m=ojqh7TeVkHwpwgO0APbKXx7TaW1tocUcc4q06uRihVU=; p=Til3JjZD0R4gplASRUa5Gvns+JXDZlmvpK9q4VqFRVc=; g=9e481f95a51887868b05f8a86c3e5a9f8aff47c6 X-Patch-Sig: m=pgp; i=u.kleine-koenig@pengutronix.de; s=0x0D2511F322BFAB1C1580266BE2DCDD9132669BD6; b=iQEzBAABCgAdFiEEfnIqFpAYrP8+dKQLwfwUeK3K7AkFAmEJE/4ACgkQwfwUeK3K7AmCWwgAj7/ c9kaXIx6z27810hsxjtVlPEhRfsu4sbg9ayL550B6MBEGBaCBGWgU5DWEuS2o904kSeiEhPX++yK1 1haqzK6dY6sn8vyszQRvBtq9CO8GUF6oZHjUOW2GnEAz1F7cbtIJCHypxfkUmcccbsa786DvxhKph lW0YxXeCEn0hb7bvwUi8yIWnjTXXnfEgoZ+3qF+8hFSdwIBZimeWLoc63O4TUGznfuSdbWMJi4Y0V lEGg9znKbGJO7kHuIevqk5V07oZOBlBWYh7OZqFPE8+l5Du12X6zR4e2VjK2NRNsvpniWfTRGWIU2 fUvCCg1pb/kU7QVIjQMOk4rFNEJRprQ== X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: xen-devel@lists.xenproject.org pcifront_common_process() has a check at the start that exits early if pcidev or pdidev->driver are NULL. So simplify the following code by not checking these two again. Signed-off-by: Uwe Kleine-König Reviewed-by: Boris Ostrovsky --- drivers/pci/xen-pcifront.c | 57 +++++++++++++++++--------------------- 1 file changed, 25 insertions(+), 32 deletions(-) diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c index b7a8f3a1921f..3c648e6cb8f8 100644 --- a/drivers/pci/xen-pcifront.c +++ b/drivers/pci/xen-pcifront.c @@ -591,7 +591,6 @@ static pci_ers_result_t pcifront_common_process(int cmd, int devfn = pdev->sh_info->aer_op.devfn; int domain = pdev->sh_info->aer_op.domain; struct pci_dev *pcidev; - int flag = 0; dev_dbg(&pdev->xdev->dev, "pcifront AER process: cmd %x (bus:%x, devfn%x)", @@ -606,40 +605,34 @@ static pci_ers_result_t pcifront_common_process(int cmd, } pdrv = pcidev->driver; - if (pdrv) { - if (pdrv->err_handler && pdrv->err_handler->error_detected) { - pci_dbg(pcidev, "trying to call AER service\n"); - if (pcidev) { - flag = 1; - switch (cmd) { - case XEN_PCI_OP_aer_detected: - result = pdrv->err_handler-> - error_detected(pcidev, state); - break; - case XEN_PCI_OP_aer_mmio: - result = pdrv->err_handler-> - mmio_enabled(pcidev); - break; - case XEN_PCI_OP_aer_slotreset: - result = pdrv->err_handler-> - slot_reset(pcidev); - break; - case XEN_PCI_OP_aer_resume: - pdrv->err_handler->resume(pcidev); - break; - default: - dev_err(&pdev->xdev->dev, - "bad request in aer recovery " - "operation!\n"); - - } - } + if (pdrv->err_handler && pdrv->err_handler->error_detected) { + pci_dbg(pcidev, "trying to call AER service\n"); + switch (cmd) { + case XEN_PCI_OP_aer_detected: + result = pdrv->err_handler-> + error_detected(pcidev, state); + break; + case XEN_PCI_OP_aer_mmio: + result = pdrv->err_handler-> + mmio_enabled(pcidev); + break; + case XEN_PCI_OP_aer_slotreset: + result = pdrv->err_handler-> + slot_reset(pcidev); + break; + case XEN_PCI_OP_aer_resume: + pdrv->err_handler->resume(pcidev); + break; + default: + dev_err(&pdev->xdev->dev, + "bad request in aer recovery " + "operation!\n"); } + + return result; } - if (!flag) - result = PCI_ERS_RESULT_NONE; - return result; + return PCI_ERS_RESULT_NONE; }