From patchwork Tue Sep 19 13:31:16 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: 13391390 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 B4EB0CD5BC5 for ; Tue, 19 Sep 2023 13:32:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232395AbjISNc3 (ORCPT ); Tue, 19 Sep 2023 09:32:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232377AbjISNcY (ORCPT ); Tue, 19 Sep 2023 09:32:24 -0400 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 22B0B123 for ; Tue, 19 Sep 2023 06:32:18 -0700 (PDT) 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 1qiapo-0004cu-T4; Tue, 19 Sep 2023 15:32:12 +0200 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 1qiapo-007T37-Gf; Tue, 19 Sep 2023 15:32:12 +0200 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qiapo-0030e0-7P; Tue, 19 Sep 2023 15:32:12 +0200 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Vinod Koul Cc: Lars-Peter Clausen , dmaengine@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH 08/59] dma: dma-axi-dmac: Convert to platform remove callback returning void Date: Tue, 19 Sep 2023 15:31:16 +0200 Message-Id: <20230919133207.1400430-9-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230919133207.1400430-1-u.kleine-koenig@pengutronix.de> References: <20230919133207.1400430-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1872; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=99OwXr0hmWPlmyfASShSvAN68AkTRB2aVRt5rXN0+fg=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlCaG3UlpuujX2zZzYR1gJYk92ofqyh81zQQera j9AnqR6dnOJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZQmhtwAKCRCPgPtYfRL+ ToucB/9uFvEtSRuXG/VVj6eStL37PvhkdMaxof8cR7vKNevjpnRHF862poWQwN8bSbfgRPi8VaZ gKAbC/VGotYMw52kPGRqBPPAXiLBzuZyaHgAVUV1lAvhsyBW4T5ukAZTP6R0bJK04lRmF7T+UqP Zj+z76g+bMt8D+UbofyVr1/gbZt2kJKzRPyxjixJBGDKjuyZyMTJlW1Tea0nJLZKra5O1rxsaNI s8wFRq/bPxbjE/6JDCozo1YH9hzo0XlmWYY6+EFwhs4gJpzxiXdkL7iX9b9BWxiyY3I4jx6w40q IG3eC3vcbvc0Vk20LPvevZADO8O6HmnTolNIWb3CiPCeMxH4 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: dmaengine@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@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() is renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König --- drivers/dma/dma-axi-dmac.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c index fc7cdad37161..a6d235bc8444 100644 --- a/drivers/dma/dma-axi-dmac.c +++ b/drivers/dma/dma-axi-dmac.c @@ -1029,7 +1029,7 @@ static int axi_dmac_probe(struct platform_device *pdev) return ret; } -static int axi_dmac_remove(struct platform_device *pdev) +static void axi_dmac_remove(struct platform_device *pdev) { struct axi_dmac *dmac = platform_get_drvdata(pdev); @@ -1038,8 +1038,6 @@ static int axi_dmac_remove(struct platform_device *pdev) tasklet_kill(&dmac->chan.vchan.task); dma_async_device_unregister(&dmac->dma_dev); clk_disable_unprepare(dmac->clk); - - return 0; } static const struct of_device_id axi_dmac_of_match_table[] = { @@ -1054,7 +1052,7 @@ static struct platform_driver axi_dmac_driver = { .of_match_table = axi_dmac_of_match_table, }, .probe = axi_dmac_probe, - .remove = axi_dmac_remove, + .remove_new = axi_dmac_remove, }; module_platform_driver(axi_dmac_driver);