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Tue, 26 Apr 2022 03:19:30 -0700 From: Akhil R To: , , , , , , , , , , , , , CC: Subject: [PATCH v2 1/2] dmaengine: tegra: Fix uninitialized variable usage Date: Tue, 26 Apr 2022 15:49:12 +0530 Message-ID: <20220426101913.43335-2-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220426101913.43335-1-akhilrajeev@nvidia.com> References: <20220426101913.43335-1-akhilrajeev@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2340066b-426d-48eb-32af-08da276e444b X-MS-TrafficTypeDiagnostic: CY4PR1201MB0039:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.236;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(426003)(336012)(186003)(2616005)(1076003)(47076005)(5660300002)(82310400005)(36860700001)(6666004)(7696005)(36756003)(26005)(83380400001)(107886003)(316002)(8676002)(70206006)(356005)(921005)(7416002)(4326008)(8936002)(2906002)(508600001)(110136005)(40460700003)(86362001)(81166007)(70586007)(2101003)(83996005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2022 10:19:37.0917 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2340066b-426d-48eb-32af-08da276e444b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.236];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT019.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1201MB0039 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Initialize slave_bw in dma_prep*() functions as the parameter is not set for DMA_MEM_TO_MEM case in get_transfer_param(). Though the case may never occur, initializing it avoids warning from certain static checkers Fixes: ee17028009d4 ("dmaengine: tegra: Add tegra gpcdma driver") Reported-by: Dan Carpenter Signed-off-by: Akhil R --- drivers/dma/tegra186-gpc-dma.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index f12327732041..a0dbafa07ec9 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -985,8 +985,8 @@ tegra_dma_prep_slave_sg(struct dma_chan *dc, struct sca= tterlist *sgl, { struct tegra_dma_channel *tdc =3D to_tegra_dma_chan(dc); unsigned int max_dma_count =3D tdc->tdma->chip_data->max_dma_count; + enum dma_slave_buswidth slave_bw =3D DMA_SLAVE_BUSWIDTH_UNDEFINED; u32 csr, mc_seq, apb_ptr =3D 0, mmio_seq =3D 0; - enum dma_slave_buswidth slave_bw; struct tegra_dma_sg_req *sg_req; struct tegra_dma_desc *dma_desc; struct scatterlist *sg; @@ -1103,12 +1103,12 @@ tegra_dma_prep_dma_cyclic(struct dma_chan *dc, dma_= addr_t buf_addr, size_t buf_l size_t period_len, enum dma_transfer_direction direction, unsigned long flags) { + enum dma_slave_buswidth slave_bw =3D DMA_SLAVE_BUSWIDTH_UNDEFINED; + u32 csr, mc_seq, apb_ptr =3D 0, mmio_seq =3D 0, burst_size; + unsigned int max_dma_count, len, period_count, i; struct tegra_dma_channel *tdc =3D to_tegra_dma_chan(dc); struct tegra_dma_desc *dma_desc; struct tegra_dma_sg_req *sg_req; - enum dma_slave_buswidth slave_bw; - u32 csr, mc_seq, apb_ptr =3D 0, mmio_seq =3D 0, burst_size; - unsigned int max_dma_count, len, period_count, i; dma_addr_t mem =3D buf_addr; int ret; =20 --=20 2.17.1 From nobody Sun May 10 19:14:13 2026 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 35524C433EF for ; Tue, 26 Apr 2022 10:34:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235046AbiDZKhI (ORCPT ); Tue, 26 Apr 2022 06:37:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349093AbiDZKgp (ORCPT ); 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Tue, 26 Apr 2022 10:19:42 +0000 Received: from rnnvmail203.nvidia.com (10.129.68.9) by rnnvmail203.nvidia.com (10.129.68.9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Tue, 26 Apr 2022 03:19:41 -0700 Received: from BUILDSERVER-IO-L4T.nvidia.com (10.127.8.14) by mail.nvidia.com (10.129.68.9) with Microsoft SMTP Server id 15.2.986.22 via Frontend Transport; Tue, 26 Apr 2022 03:19:37 -0700 From: Akhil R To: , , , , , , , , , , , , , CC: Subject: [PATCH v2 2/2] dmaengine: tegra: Remove unused switch case Date: Tue, 26 Apr 2022 15:49:13 +0530 Message-ID: <20220426101913.43335-3-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220426101913.43335-1-akhilrajeev@nvidia.com> References: <20220426101913.43335-1-akhilrajeev@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4d0695ac-dcaa-46db-8476-08da276e47b8 X-MS-TrafficTypeDiagnostic: SJ0PR12MB5455:EE_ X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Apr 2022 10:19:42.8257 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4d0695ac-dcaa-46db-8476-08da276e47b8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.236];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT019.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5455 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Remove unused switch case in get_transfer_param() function. The function is not called for MEM_TO_MEM transfers. Signed-off-by: Akhil R --- drivers/dma/tegra186-gpc-dma.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c index a0dbafa07ec9..6b8d34165176 100644 --- a/drivers/dma/tegra186-gpc-dma.c +++ b/drivers/dma/tegra186-gpc-dma.c @@ -830,10 +830,6 @@ static int get_transfer_param(struct tegra_dma_channel= *tdc, *slave_bw =3D tdc->dma_sconfig.src_addr_width; *csr =3D TEGRA_GPCDMA_CSR_DMA_IO2MEM_FC; return 0; - case DMA_MEM_TO_MEM: - *burst_size =3D tdc->dma_sconfig.src_addr_width; - *csr =3D TEGRA_GPCDMA_CSR_DMA_MEM2MEM; - return 0; default: dev_err(tdc2dev(tdc), "DMA direction is not supported\n"); } --=20 2.17.1