From patchwork Tue Mar 7 06:56:02 2023 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: 13163002 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 8B44DC6FD1B for ; Tue, 7 Mar 2023 08:18:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230013AbjCGISB (ORCPT ); Tue, 7 Mar 2023 03:18:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230037AbjCGIR4 (ORCPT ); Tue, 7 Mar 2023 03:17:56 -0500 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 89E444FF09 for ; Tue, 7 Mar 2023 00:17:38 -0800 (PST) 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 1pZSVk-0003g3-Lx; Tue, 07 Mar 2023 09:17:28 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1pZRF5-002Q7C-2R; Tue, 07 Mar 2023 07:56:11 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1pZRF4-002uCe-Fg; Tue, 07 Mar 2023 07:56:10 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Krzysztof Kozlowski , Wim Van Sebroeck , Guenter Roeck Cc: Alim Akhtar , linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH v2 1/2] watchdog: s3c2410: Make s3c2410_get_wdt_drv_data() return an int Date: Tue, 7 Mar 2023 07:56:02 +0100 Message-Id: <20230307065603.2253054-2-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230307065603.2253054-1-u.kleine-koenig@pengutronix.de> References: <20230307065603.2253054-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=3055; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=QceFBbZEoT2r3QXkJtJmxaZbpUExXmHFUHw+BMJmhf0=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBkBt/6TEKme0kmgt7JVegTZDxiYYug5SE4NxQih VPgYL2kE1OJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCZAbf+gAKCRDB/BR4rcrs CXwpCAChkMnOmUimP9KpfnLPRyxLYVU2V1Brn39p4n9zCVkmYCCSPFmht0SwyRNaS9WAUJpfs7e uKZBJHf2fd07AcMrVn/Y5C286m6ohE9LXqc6bBCIx3+XVVztm/R/IFeRlhDSIDQkEUU3PV3qXyb boDmopsutluKy9t8sDh7QZL8Fh4cpxEzZ72ND7A0lLK7kLcsDWyt1Q7loRjdHq2Wuxn8e9HE6py HtHtSXb7Aq2lsnw9dnufMMwiNVlwSyMrnB9eBuhRLBp6a6sI/8Jlch1mPMY4AScl8BaKs01yawL TRSdgU+kGi4wCQGaYxTJa8sU0DbcGjTkhDmQ0CXl0cOLjmgw X-Developer-Key: i=u.kleine-koenig@pengutronix.de; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 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: linux-watchdog@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org This is a preparation for making more use of dev_err_probe(). The idea is that s3c2410_get_wdt_drv_data() (as it's called only by .probe()) can make effective use of dev_err_probe() only if it returns an int. For that the assignment to wdt->drv_data has to happen in the function. The caller can then just pass on the return value in the error case. This seems to be nicer for the compiler: bloatometer reports for an ARCH=arm s3c6400_defconfig build: add/remove: 1/1 grow/shrink: 0/1 up/down: 4/-64 (-60) Function old new delta __initcall__kmod_s3c2410_wdt__209_821_s3c2410wdt_driver_init6 - 4 +4 __initcall__kmod_s3c2410_wdt__209_819_s3c2410wdt_driver_init6 4 - -4 s3c2410wdt_probe 1332 1272 -60 There is no semantical change. (Just one minor difference: Before this patch wdt->drv_data was always assigned, now that only happens in the non-error case. That doesn't matter however as *wdt is freed in the error case.) Signed-off-by: Uwe Kleine-König Reviewed-by: Guenter Roeck --- drivers/watchdog/s3c2410_wdt.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/watchdog/s3c2410_wdt.c b/drivers/watchdog/s3c2410_wdt.c index 58b262ca4e88..f3de8ef499c3 100644 --- a/drivers/watchdog/s3c2410_wdt.c +++ b/drivers/watchdog/s3c2410_wdt.c @@ -579,8 +579,8 @@ static inline unsigned int s3c2410wdt_get_bootstatus(struct s3c2410_wdt *wdt) return 0; } -static inline const struct s3c2410_wdt_variant * -s3c2410_get_wdt_drv_data(struct platform_device *pdev) +static inline int +s3c2410_get_wdt_drv_data(struct platform_device *pdev, struct s3c2410_wdt *wdt) { const struct s3c2410_wdt_variant *variant; struct device *dev = &pdev->dev; @@ -603,24 +603,26 @@ s3c2410_get_wdt_drv_data(struct platform_device *pdev) "samsung,cluster-index", &index); if (err) { dev_err(dev, "failed to get cluster index\n"); - return NULL; + return -EINVAL; } switch (index) { case 0: - return variant; + break; case 1: - return (variant == &drv_data_exynos850_cl0) ? + variant = (variant == &drv_data_exynos850_cl0) ? &drv_data_exynos850_cl1 : &drv_data_exynosautov9_cl1; + break; default: dev_err(dev, "wrong cluster index: %u\n", index); - return NULL; + return -EINVAL; } } #endif - return variant; + wdt->drv_data = variant; + return 0; } static void s3c2410wdt_wdt_disable_action(void *data) @@ -644,9 +646,9 @@ static int s3c2410wdt_probe(struct platform_device *pdev) spin_lock_init(&wdt->lock); wdt->wdt_device = s3c2410_wdd; - wdt->drv_data = s3c2410_get_wdt_drv_data(pdev); - if (!wdt->drv_data) - return -EINVAL; + ret = s3c2410_get_wdt_drv_data(pdev, wdt); + if (ret) + return ret; if (wdt->drv_data->quirks & QUIRKS_HAVE_PMUREG) { wdt->pmureg = syscon_regmap_lookup_by_phandle(dev->of_node,