From patchwork Fri Nov 24 08:06:26 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: 13467152 Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BC4A10E3 for ; Fri, 24 Nov 2023 00:10:48 -0800 (PST) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1r6RGo-0005I3-U5; Fri, 24 Nov 2023 09:10:38 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1r6RGo-00BDaL-GZ; Fri, 24 Nov 2023 09:10:38 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1r6RGo-007Hha-6y; Fri, 24 Nov 2023 09:10:38 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Ulf Hansson , Shawn Guo , Sascha Hauer , Linus Walleij , "Rafael J. Wysocki" , Pengfei Li , Rob Herring Cc: Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/9] pmdomain: imx-gpc: Convert to platform remove callback returning void Date: Fri, 24 Nov 2023 09:06:26 +0100 Message-ID: <20231124080623.564924-3-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.42.0.586.gbc5204569f7d.dirty In-Reply-To: <20231124080623.564924-1-u.kleine-koenig@pengutronix.de> References: <20231124080623.564924-1-u.kleine-koenig@pengutronix.de> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2675; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=mKChXHMFVY1JJWqUlD+w8FECqRJL7ZasmTNw0fEjF3w=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlYFmBSON/a7bIBde/yMEceSyMp/wrEkc+FhAy5 8ivySAIsjKJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZWBZgQAKCRCPgPtYfRL+ TgbNCACYvUoW7hCPSuRRyrdtoNDgvF6/cS23DTEHBUfHrVAmGKxXuDWmluQrw8l4+Y4GFyeKwGh 2r0eO8u699EDCGVIbwQHz0VUfL0OspFhPRawwJ0iFTO8jqS+07YvwZEJF5PKMzJ/w4c3chBenHZ VcM3/ny6LOX+5mcg4IRO4lk6BLrnoN0BkKav4MozA5wPfOoK+3Gu/QtksmYH2ody5CVulJxYxQR caDhN8EQEfQ3+iqJzCGhnOgxze1Z4SiiKP2Zq7hKhoa/PfmiN6rzJFk/pbTDW+gFwTRvIaaa/MZ KrtIWSpLDmdNlWMtgRCzxAF/qiXeCMmT2dv2PgJHQ3WhCh1m 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.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-pm@vger.kernel.org The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). In the error path emit an error message replacing the (less useful) message by the core. Apart from the improved error message there is no change in behaviour. Signed-off-by: Uwe Kleine-König --- drivers/pmdomain/imx/gpc.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) diff --git a/drivers/pmdomain/imx/gpc.c b/drivers/pmdomain/imx/gpc.c index d6cf3759570b..9517cce93d8a 100644 --- a/drivers/pmdomain/imx/gpc.c +++ b/drivers/pmdomain/imx/gpc.c @@ -509,7 +509,7 @@ static int imx_gpc_probe(struct platform_device *pdev) return 0; } -static int imx_gpc_remove(struct platform_device *pdev) +static void imx_gpc_remove(struct platform_device *pdev) { struct device_node *pgc_node; int ret; @@ -519,7 +519,7 @@ static int imx_gpc_remove(struct platform_device *pdev) /* bail out if DT too old and doesn't provide the necessary info */ if (!of_property_read_bool(pdev->dev.of_node, "#power-domain-cells") && !pgc_node) - return 0; + return; /* * If the old DT binding is used the toplevel driver needs to @@ -529,16 +529,20 @@ static int imx_gpc_remove(struct platform_device *pdev) of_genpd_del_provider(pdev->dev.of_node); ret = pm_genpd_remove(&imx_gpc_domains[GPC_PGC_DOMAIN_PU].base); - if (ret) - return ret; + if (ret) { + dev_err(&pdev->dev, "Failed to remove PU power domain (%pe)\n", + ERR_PTR(ret)); + return; + } imx_pgc_put_clocks(&imx_gpc_domains[GPC_PGC_DOMAIN_PU]); ret = pm_genpd_remove(&imx_gpc_domains[GPC_PGC_DOMAIN_ARM].base); - if (ret) - return ret; + if (ret) { + dev_err(&pdev->dev, "Failed to remove ARM power domain (%pe)\n", + ERR_PTR(ret)); + return; + } } - - return 0; } static struct platform_driver imx_gpc_driver = { @@ -547,6 +551,6 @@ static struct platform_driver imx_gpc_driver = { .of_match_table = imx_gpc_dt_ids, }, .probe = imx_gpc_probe, - .remove = imx_gpc_remove, + .remove_new = imx_gpc_remove, }; builtin_platform_driver(imx_gpc_driver)