From patchwork Mon Dec 19 14:46:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 13076674 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 9A243C4708E for ; Mon, 19 Dec 2022 14:47:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231739AbiLSOri (ORCPT ); Mon, 19 Dec 2022 09:47:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46426 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231812AbiLSOrQ (ORCPT ); Mon, 19 Dec 2022 09:47:16 -0500 Received: from post.baikalelectronics.com (post.baikalelectronics.com [213.79.110.86]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 96F0F62C2; Mon, 19 Dec 2022 06:47:03 -0800 (PST) Received: from post.baikalelectronics.com (localhost.localdomain [127.0.0.1]) by post.baikalelectronics.com (Proxmox) with ESMTP id B346BE0EB0; Mon, 19 Dec 2022 17:47:02 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= baikalelectronics.ru; h=cc:cc:content-transfer-encoding :content-type:content-type:date:from:from:in-reply-to:message-id :mime-version:references:reply-to:subject:subject:to:to; s=post; bh=CMqRD5y1KwNE68dtSN0+jpInJ/I2HNrwqeLfpSXlN4g=; b=NR8GHwfwNrZ9 pOzkbpHGVz3FzZvMoCub9u9MYAp5zkv7ed+vOnzKLdc41VqAnNl9GueQXHmT4gZA S2e24mHaoy6VQ8WW+6GswxPGKVxmDmvg2iWSlEbtpcgeIl0atRjH4krOIaFGFbC3 QhlOV1ODixRpHdGrTz1WcdG3OxEIG84= Received: from mail.baikal.int (mail.baikal.int [192.168.51.25]) by post.baikalelectronics.com (Proxmox) with ESMTP id A875AE0E70; Mon, 19 Dec 2022 17:47:02 +0300 (MSK) Received: from localhost (10.8.30.14) by mail (192.168.51.25) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 19 Dec 2022 17:47:02 +0300 From: Serge Semin To: Gustavo Pimentel , Vinod Koul , Rob Herring , Bjorn Helgaas , Lorenzo Pieralisi , Cai Huoqing , Robin Murphy , Jingoo Han , Frank Li , Manivannan Sadhasivam CC: Serge Semin , Serge Semin , Alexey Malahov , Pavel Parkhomenko , =?utf-8?q?Krzys?= =?utf-8?q?ztof_Wilczy=C5=84ski?= , caihuoqing , Yoshihiro Shimoda , , , , Gustavo Pimentel Subject: [PATCH v8 02/26] dmaengine: dw-edma: Release requested IRQs on failure Date: Mon, 19 Dec 2022 17:46:33 +0300 Message-ID: <20221219144658.26620-3-Sergey.Semin@baikalelectronics.ru> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221219144658.26620-1-Sergey.Semin@baikalelectronics.ru> References: <20221219144658.26620-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-Originating-IP: [10.8.30.14] X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From very beginning of the DW eDMA driver live in the kernel the method dw_edma_irq_request() hasn't been designed quite correct. In case if the request_irq() method fails to initialize the IRQ handler at some point the previously requested IRQs will be left initialized. It's prune to errors up to the system crash. Let's fix that by releasing the previously requested IRQs in the cleanup-on-error path of the dw_edma_irq_request() function. Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver") Signed-off-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Tested-by: Manivannan Sadhasivam Acked-by: Vinod Koul --- Changelog v2: - This is a new patch added in v2 iteration of the series. --- drivers/dma/dw-edma/dw-edma-core.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index c54b24ff5206..a8c1bd9c7ae9 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -893,10 +893,8 @@ static int dw_edma_irq_request(struct dw_edma *dw, dw_edma_interrupt_read, IRQF_SHARED, dw->name, &dw->irq[i]); - if (err) { - dw->nr_irqs = i; - return err; - } + if (err) + goto err_irq_free; if (irq_get_msi_desc(irq)) get_cached_msi_msg(irq, &dw->irq[i].msi); @@ -905,6 +903,14 @@ static int dw_edma_irq_request(struct dw_edma *dw, dw->nr_irqs = i; } + return 0; + +err_irq_free: + for (i--; i >= 0; i--) { + irq = chip->ops->irq_vector(dev, i); + free_irq(irq, &dw->irq[i]); + } + return err; }