From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f44.google.com (mail-pj1-f44.google.com [209.85.216.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 956E5470451 for ; Mon, 17 Aug 2026 20:12:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.44 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786997525; cv=none; b=CdhAC+M/wkjjsaZMniouUnFUiFMJnxmYjGPvVZzCSmwGzvaCGRFHhez7GH+9JNdYihVgPrIHZTnRmeFIPZujQMcMmw9SK40d01ELiiLOg1eYbI1idYch/csR0EUUChVJdHL/RmGxQvQdPIJgcbfVsHqreHOaU9Jv10zkb7WN2AI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786997525; c=relaxed/simple; bh=5aHoeHnspGbVCEH0kRDUdJBZzPUztTHeiM1Ps6QIBKk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=uRkXPlBVLGlRBL6Bg2JerbB6hK+FFGbx+zGfBujPX/2icSg+sWIXFdoqstjnDmCqYbTtIuE/wdwOkRLmOtycZd7sANlCKrJP0qJxAa0CsEnlTjiQAEZkplzBFs8ID7S/aPrFNNND7ueQZyDUufm9Ifnh2Jx1SWTamWW3hhGxAlI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=r9elgaQj; arc=none smtp.client-ip=209.85.216.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="r9elgaQj" Received: by mail-pj1-f44.google.com with SMTP id 98e67ed59e1d1-38dfe7eb825so2979603a91.0 for ; Mon, 17 Aug 2026 13:12:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1786997523; x=1787602323; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=RXw3GvcQ0suhRqm3C8ZSkikl01zp6z0tF3rJPTXGM90=; b=r9elgaQjSrqKSde4V8TQbsXh7WGbx2b3mObRTrmQpN6ZqXndFhVT+BFMbk+v939mMj YYL5QzKsbFwz8iNLpT0hq+4OUtSuGoTNROCNNu6X+rRM8BWjKGViGNTi7KPO99lTqoFP wqi6h4DHHWvtvzPyecK7OGEwkUVBtGH6mWX5066nsCJnUljl0Ud1FK6fxI25WelNXbvy EHLEl55qDIR4Zw4Eqyi61glbTNQjbl8/Wj/P4G6I14AnomSCMY7goRCgIzlFYl1w2aMT P12XP/k0uCH8lLqP3mOFuY/u8Pm5WI7eOVhhn3ut9v+oztIbAuQKAbmTRej53vWWWx6q 73Ew== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786997523; x=1787602323; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=RXw3GvcQ0suhRqm3C8ZSkikl01zp6z0tF3rJPTXGM90=; b=fezSiCa4vzRtKnv4IPXeozI1qud0FN+EhqbTyZkqqu27UmmkAU9uRLyT8fIchh/lQw ymzrKVKQVew07/udDs+zDjmc27XZf+B6ppYuQy0ZZNvExyW1Dz7PxXkO9Cbq7AxYgNLM IUEmpUg4IfDaY9spj9FCTn7IeyT6kAX/+oLdaUNXEaAsONH9H2sJkEJ3R2Qqcq74Wfii /s3J2reIsUodNL0GiKuy6zum0/OEUmZzIiZrnIWFSOHIBAW9nFmYCjNG04Ejz8tqD+Fd 86bTVovW7vb57XjCvsJIR9rpz+qaeAKs9Fg1COWMAxYAQzw7aHR8LxaPJmJXDTWZRO37 w1WQ== X-Forwarded-Encrypted: i=1; AHgh+Rpb2aKZWS3wnTxD6LLj0rVeIaNxJBBgCVbyh1v+hOEh+mmbaEvoGjwsBfhCJE7cdUtyYgj+MMNeNV/tAwE=@vger.kernel.org X-Gm-Message-State: AOJu0YyWjkcTT911NvMEp1nRX0qSY5E7ieX6l9CFvLKr/2Be1T7+NzBC exgh4onAUoaCaUiuSKiOQ6pRMzSWhwDwOLNDT/pgTvOgKQKHjggrVBV1 X-Gm-Gg: AR+sD1363vkBUXVvF8sw9/s0tnZYI53lBofKG9r3ZR9b2ZQJJssEnT2egE02H3fNWe0 qHfalcfUoCMcraXE5wd9nTsp5zjWsnpZJsJhnK9d9qAOwpD9x4zSK/H6r35f73lxZBwWR2g5Qwn iny4Ktvh1VS2d8aisBIoiaJ4D5dMniLfDAMbC7mURuy2jsN4N6N3g482VH7jGe9VZUO2dQGLBO7 U55Cri4F7qgRK0gXUwhjBl9paK0JHcOGjAsjukNrJvYwHzo7ERlN/hpUvIJuf5gLi8xo86wEYYB zw5UrtP1NKZbpto9Yuwf7FgrvCDgDynVRw5EylHJm1tXkCmbqX0aUYAcp5GCyGAtgUG4hqvC55A oEwycEJSV0OZs4152YRumeel4ZxRDfmd/AFi4LuGdTMU6RN7fuhwKYA0rIiYSKUwe232MnE+Zdo wQDi45ZkfJ158xgnFP4/YOD6Yr5yjykVTzNkIgRGK+rOSX9OnDOlfG0B2uBf6nHgSPDe8eIk/ST QLYtJAx7A+2xmXMjzxHVruVS870hgzcFp51c5eQEDrBA2r/Zoe0hJvY68W5KEdz4VVmInEiKyAL 9LNROvofx5k/0zqx+uMVDH9NSwlDKvI/dHY8NQ== X-Received: by 2002:a17:90b:5606:b0:381:25ce:bcc2 with SMTP id 98e67ed59e1d1-3933b78b698mr28362534a91.6.1786997522783; Mon, 17 Aug 2026 13:12:02 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39531e84244sm6315796a91.6.2026.08.17.13.12.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2026 13:12:01 -0700 (PDT) From: Rosen Penev To: dmaengine@vger.kernel.org Cc: Ludovic Desroches , Vinod Koul , Frank Li , linux-arm-kernel@lists.infradead.org (moderated list:MICROCHIP AT91 DMA DRIVERS), linux-kernel@vger.kernel.org (open list) Subject: [PATCHv3] dmaengine: at_hdmac: use devm APIs in probe() Date: Mon, 17 Aug 2026 13:12:00 -0700 Message-ID: <20260817201200.10952-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Convert resource allocation and setup in probe() to use devm-managed APIs. Simplify the error handling path and removes explicit cleanup code. Assisted-by: opencode:big-pickle Signed-off-by: Rosen Penev --- v3: fix subject and description v2: remove list_del drivers/dma/at_hdmac.c | 50 ++++++++++-------------------------------- 1 file changed, 11 insertions(+), 39 deletions(-) diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 971f8bc9ec48..49a85ac66e83 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -1986,40 +1986,34 @@ static int __init at_dma_probe(struct platform_device *pdev) atdma->dma_device.cap_mask = plat_dat->cap_mask; atdma->all_chan_mask = (1 << plat_dat->nr_channels) - 1; - atdma->clk = devm_clk_get(&pdev->dev, "dma_clk"); + atdma->clk = devm_clk_get_enabled(&pdev->dev, "dma_clk"); if (IS_ERR(atdma->clk)) return PTR_ERR(atdma->clk); - err = clk_prepare_enable(atdma->clk); - if (err) - return err; - /* force dma off, just in case */ at_dma_off(atdma); - err = request_irq(irq, at_dma_interrupt, 0, "at_hdmac", atdma); + err = devm_request_irq(&pdev->dev, irq, at_dma_interrupt, 0, "at_hdmac", atdma); if (err) - goto err_irq; + return err; platform_set_drvdata(pdev, atdma); /* create a pool of consistent memory blocks for hardware descriptors */ - atdma->lli_pool = dma_pool_create("at_hdmac_lli_pool", + atdma->lli_pool = dmam_pool_create("at_hdmac_lli_pool", &pdev->dev, sizeof(struct at_lli), 4 /* word alignment */, 0); if (!atdma->lli_pool) { dev_err(&pdev->dev, "Unable to allocate DMA LLI descriptor pool\n"); - err = -ENOMEM; - goto err_desc_pool_create; + return -ENOMEM; } /* create a pool of consistent memory blocks for memset blocks */ - atdma->memset_pool = dma_pool_create("at_hdmac_memset_pool", + atdma->memset_pool = dmam_pool_create("at_hdmac_memset_pool", &pdev->dev, sizeof(int), 4, 0); if (!atdma->memset_pool) { dev_err(&pdev->dev, "No memory for memset dma pool\n"); - err = -ENOMEM; - goto err_memset_pool_create; + return -ENOMEM; } /* clear any pending interrupt */ @@ -2086,10 +2080,10 @@ static int __init at_dma_probe(struct platform_device *pdev) dma_has_cap(DMA_SLAVE, atdma->dma_device.cap_mask) ? "slave " : "", plat_dat->nr_channels); - err = dma_async_device_register(&atdma->dma_device); + err = dmaenginem_async_device_register(&atdma->dma_device); if (err) { dev_err(&pdev->dev, "Unable to register: %d.\n", err); - goto err_dma_async_device_register; + return err; } /* @@ -2098,27 +2092,15 @@ static int __init at_dma_probe(struct platform_device *pdev) * dma_request_channel(). */ if (pdev->dev.of_node) { - err = of_dma_controller_register(pdev->dev.of_node, + err = devm_of_dma_controller_register(&pdev->dev, pdev->dev.of_node, at_dma_xlate, atdma); if (err) { dev_err(&pdev->dev, "could not register of_dma_controller\n"); - goto err_of_dma_controller_register; + return err; } } return 0; - -err_of_dma_controller_register: - dma_async_device_unregister(&atdma->dma_device); -err_dma_async_device_register: - dma_pool_destroy(atdma->memset_pool); -err_memset_pool_create: - dma_pool_destroy(atdma->lli_pool); -err_desc_pool_create: - free_irq(platform_get_irq(pdev, 0), atdma); -err_irq: - clk_disable_unprepare(atdma->clk); - return err; } static void at_dma_remove(struct platform_device *pdev) @@ -2127,22 +2109,12 @@ static void at_dma_remove(struct platform_device *pdev) struct dma_chan *chan, *_chan; at_dma_off(atdma); - if (pdev->dev.of_node) - of_dma_controller_free(pdev->dev.of_node); - dma_async_device_unregister(&atdma->dma_device); - - dma_pool_destroy(atdma->memset_pool); - dma_pool_destroy(atdma->lli_pool); - free_irq(platform_get_irq(pdev, 0), atdma); list_for_each_entry_safe(chan, _chan, &atdma->dma_device.channels, device_node) { /* Disable interrupts */ atc_disable_chan_irq(atdma, chan->chan_id); - list_del(&chan->device_node); } - - clk_disable_unprepare(atdma->clk); } static void at_dma_shutdown(struct platform_device *pdev) -- 2.55.0