From patchwork Tue Apr 19 11:34:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krzysztof Kozlowski X-Patchwork-Id: 12818027 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3BCAC352A1 for ; Tue, 19 Apr 2022 11:35:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351405AbiDSLhz (ORCPT ); Tue, 19 Apr 2022 07:37:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40578 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1351422AbiDSLhk (ORCPT ); Tue, 19 Apr 2022 07:37:40 -0400 Received: from mail-ej1-x62f.google.com (mail-ej1-x62f.google.com [IPv6:2a00:1450:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDCA9BF7B for ; Tue, 19 Apr 2022 04:34:56 -0700 (PDT) Received: by mail-ej1-x62f.google.com with SMTP id r13so32272572ejd.5 for ; Tue, 19 Apr 2022 04:34:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=mHITSW/sgmw/Csyhuirx5ijnYnrGvi4Rk0KXIhii9OU=; b=RnhwUSNPSlsDsHGPitwMc/StYqoJqak4SKMxZbfS2eb8LtGLb63EvbePNBmDHLltnr a95QDWP3DSxLY6QLGPjfmuL6tPXJGC7TYPqcPniVL9iZgwlT3Rp6PxuuP/hHZOROpblY 4xSqkC1UhzTftf64Pmfucom7rA2Be++fNWm4OyhtZFTtY74JnIyzObWJz5rtFh5ybYsH gtsw9Mpgs+Y6wXCa9TfpK2EwMMzg2ejUgOgTwTN0Svrls8LBuQSnqM9jsPd58NbbXscC Sopr0DYbonlMU/RRIFHcBUzsXdrFy3z5QLa5yDOoeuXh955iaImcAPyBngHbSKOF9aOa dXpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=mHITSW/sgmw/Csyhuirx5ijnYnrGvi4Rk0KXIhii9OU=; b=xufEfA3y0Z7iPKXNWu2vtfpz7pLzJSWsA+gDwfMo6amgcE8nN4PxKYc8lST14b0ZW0 NfDDzR4CYu7FBsZSoHECz0iJ2f5Zfm2TVMlYN6hKkzUx/ueO8BAd9HcG19zVV8P3iajN JLTJziOsomlrQYTfS7gcSsdlVtREhaeFiQ3xPGpfrx5WULRor9fRuF+5Iuwc9mkovQiA FyZsyKTL/F0nJjKyNRHbgCZtMuafZmqWwCMHdYzBygG8e96zarzfBFhOMhZR0OCjSN9b Uykv+YSbOEzf/jTyZ7hH/RlKUFipok1IiWh7BjIazsmZc6g4IPJ/P3D+/87U1qlt0yBT 9vPg== X-Gm-Message-State: AOAM532I29OiyWu4W6noKs2p75z7Sn3fWkuyK0kmqnLW4Va2MiTKFrO8 P9p6KBz5KRfMCffQJvOyYau9Lw== X-Google-Smtp-Source: ABdhPJz05wDzulDX1uvC/c0sYcGCEPyff/Cn9Wz9PTsBlv3egJ1Qqj70FmLi/yekmWxgOyyFheLI5Q== X-Received: by 2002:a17:907:62a9:b0:6da:7953:4df0 with SMTP id nd41-20020a17090762a900b006da79534df0mr12923778ejc.316.1650368095428; Tue, 19 Apr 2022 04:34:55 -0700 (PDT) Received: from localhost.localdomain (xdsl-188-155-176-92.adslplus.ch. [188.155.176.92]) by smtp.gmail.com with ESMTPSA id ce21-20020a170906b25500b006e89869cbf9sm5608802ejb.105.2022.04.19.04.34.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Apr 2022 04:34:55 -0700 (PDT) From: Krzysztof Kozlowski To: Greg Kroah-Hartman , "Rafael J. Wysocki" Cc: Stuart Yoder , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , Bjorn Helgaas , Bjorn Andersson , Mathieu Poirier , Vineeth Vijayan , Peter Oberparleiter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Andy Gross , linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, NXP Linux Team , linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-pci@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, linux-spi@vger.kernel.org, virtualization@lists.linux-foundation.org, Linus Torvalds , Rasmus Villemoes , Andy Shevchenko , Krzysztof Kozlowski Subject: [PATCH v7 05/12] PCI: Use driver_set_override() instead of open-coding Date: Tue, 19 Apr 2022 13:34:28 +0200 Message-Id: <20220419113435.246203-6-krzysztof.kozlowski@linaro.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220419113435.246203-1-krzysztof.kozlowski@linaro.org> References: <20220419113435.246203-1-krzysztof.kozlowski@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Use a helper to set driver_override to the reduce amount of duplicated code. Make the driver_override field const char, because it is not modified by the core and it matches other subsystems. Signed-off-by: Krzysztof Kozlowski Acked-by: Bjorn Helgaas Reviewed-by: Andy Shevchenko --- drivers/pci/pci-sysfs.c | 28 ++++------------------------ include/linux/pci.h | 6 +++++- 2 files changed, 9 insertions(+), 25 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index c263ffc5884a..fc804e08e3cb 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -567,31 +567,11 @@ static ssize_t driver_override_store(struct device *dev, const char *buf, size_t count) { struct pci_dev *pdev = to_pci_dev(dev); - char *driver_override, *old, *cp; - - /* We need to keep extra room for a newline */ - if (count >= (PAGE_SIZE - 1)) - return -EINVAL; - - driver_override = kstrndup(buf, count, GFP_KERNEL); - if (!driver_override) - return -ENOMEM; - - cp = strchr(driver_override, '\n'); - if (cp) - *cp = '\0'; - - device_lock(dev); - old = pdev->driver_override; - if (strlen(driver_override)) { - pdev->driver_override = driver_override; - } else { - kfree(driver_override); - pdev->driver_override = NULL; - } - device_unlock(dev); + int ret; - kfree(old); + ret = driver_set_override(dev, &pdev->driver_override, buf, count); + if (ret) + return ret; return count; } diff --git a/include/linux/pci.h b/include/linux/pci.h index 60adf42460ab..844d38f589cf 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -516,7 +516,11 @@ struct pci_dev { u16 acs_cap; /* ACS Capability offset */ phys_addr_t rom; /* Physical address if not from BAR */ size_t romlen; /* Length if not from BAR */ - char *driver_override; /* Driver name to force a match */ + /* + * Driver name to force a match. Do not set directly, because core + * frees it. Use driver_set_override() to set or clear it. + */ + const char *driver_override; unsigned long priv_flags; /* Private flags for the PCI driver */