From patchwork Tue Sep 19 13:31:29 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: 13391389 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 E50E7CD5BBD for ; Tue, 19 Sep 2023 13:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232357AbjISNc1 (ORCPT ); Tue, 19 Sep 2023 09:32:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232376AbjISNcY (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 8E99A114 for ; Tue, 19 Sep 2023 06:32:17 -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 1qiapr-0004l8-SX; Tue, 19 Sep 2023 15:32:15 +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 1qiapr-007T3z-Bf; Tue, 19 Sep 2023 15:32:15 +0200 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qiapq-0030ep-Vu; Tue, 19 Sep 2023 15:32:15 +0200 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Vinod Koul Cc: dmaengine@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH 21/59] dma: mcf-edma-main: Convert to platform remove callback returning void Date: Tue, 19 Sep 2023 15:31:29 +0200 Message-Id: <20230919133207.1400430-22-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=1800; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=x7UfmXVGm7Okn+cBzQEEASwC552geO68PJM2twF1NLs=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlCaHGU+hiiIWkjwPhSqFwxR0TfULYwb2C2z5Ti PPJE+XUXkmJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZQmhxgAKCRCPgPtYfRL+ Tq1ZB/9lbH50D/1zYLMVvEB2pXSo8UYaxZXene+0VcBLY18z4liHy53qosbQCJlHNwXyWss/iMB 3yn2eMrcHMZhhl9mzlleAxvi0UUUjgFkX3QGtO4Yt6W0MFFIFeBz8eMa7NxdXb8p3i0NHo/s5Lp b+mRRh7+7eK/kgwSehgdX+iw/494NlrJ1fS+fytWtyeTbC4wEXNBeg0JiP17P0DcpzWW6ebNj+s Lhz14ctgtKPBhvRs7J6POG4Y3uEmbX/smxryy3IrxCrfkvH2sOAEBzr9AhEpNNSuayYh1tVZsnS 1E0kOGigCV82+wakpI/B3Rm7SqHKlKy9+yrA+Ibx4NoHaDWV 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/mcf-edma-main.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/dma/mcf-edma-main.c b/drivers/dma/mcf-edma-main.c index b359421ee9ea..ab21455d9c3a 100644 --- a/drivers/dma/mcf-edma-main.c +++ b/drivers/dma/mcf-edma-main.c @@ -255,15 +255,13 @@ static int mcf_edma_probe(struct platform_device *pdev) return 0; } -static int mcf_edma_remove(struct platform_device *pdev) +static void mcf_edma_remove(struct platform_device *pdev) { struct fsl_edma_engine *mcf_edma = platform_get_drvdata(pdev); mcf_edma_irq_free(pdev, mcf_edma); fsl_edma_cleanup_vchan(&mcf_edma->dma_dev); dma_async_device_unregister(&mcf_edma->dma_dev); - - return 0; } static struct platform_driver mcf_edma_driver = { @@ -271,7 +269,7 @@ static struct platform_driver mcf_edma_driver = { .name = "mcf-edma", }, .probe = mcf_edma_probe, - .remove = mcf_edma_remove, + .remove_new = mcf_edma_remove, }; bool mcf_edma_filter_fn(struct dma_chan *chan, void *param)