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Mon, 28 Mar 2022 04:59:53 +0000 Received: from SJ0PR11MB5598.namprd11.prod.outlook.com ([fe80::90bc:9408:541e:5b94]) by SJ0PR11MB5598.namprd11.prod.outlook.com ([fe80::90bc:9408:541e:5b94%7]) with mapi id 15.20.5102.022; Mon, 28 Mar 2022 04:59:53 +0000 Message-ID: <0daa1ccb-3ca1-480b-9965-62f62342f901@intel.com> Date: Mon, 28 Mar 2022 12:59:46 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0 Thunderbird/91.7.0 Subject: [drm-misc:for-linux-next 2/3] drivers/dma-buf/st-dma-fence-unwrap.c:148:4: warning: Value stored to 'err' is never read [clang-analyzer-deadcode.DeadStores] References: <202203270435.TtRcG3Pv-lkp@intel.com> Content-Language: en-US To: =?UTF-8?Q?Christian_K=c3=b6nig?= CC: , , "Linux Kernel Mailing List" , Daniel Vetter From: kernel test robot In-Reply-To: <202203270435.TtRcG3Pv-lkp@intel.com> X-Forwarded-Message-Id: <202203270435.TtRcG3Pv-lkp@intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: HK2PR02CA0127.apcprd02.prod.outlook.com (2603:1096:202:16::11) To SJ0PR11MB5598.namprd11.prod.outlook.com (2603:10b6:a03:304::12) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: dcd74644-d03d-4e09-dfd8-08da1077cbe8 X-MS-TrafficTypeDiagnostic: BN7PR11MB2595:EE_ X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-Microsoft-Antispam-PRVS: X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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^ ~~~~~~~ vim +/err +148 drivers/dma-buf/st-dma-fence-unwrap.c 64a8f92fd783e75 Christian König 2022-03-11 120 64a8f92fd783e75 Christian König 2022-03-11 121 static int unwrap_array(void *arg) 64a8f92fd783e75 Christian König 2022-03-11 122 { 64a8f92fd783e75 Christian König 2022-03-11 123 struct dma_fence *fence, *f1, *f2, *array; 64a8f92fd783e75 Christian König 2022-03-11 124 struct dma_fence_unwrap iter; 64a8f92fd783e75 Christian König 2022-03-11 125 int err = 0; 64a8f92fd783e75 Christian König 2022-03-11 126 64a8f92fd783e75 Christian König 2022-03-11 127 f1 = mock_fence(); 64a8f92fd783e75 Christian König 2022-03-11 128 if (!f1) 64a8f92fd783e75 Christian König 2022-03-11 129 return -ENOMEM; 64a8f92fd783e75 Christian König 2022-03-11 130 64a8f92fd783e75 Christian König 2022-03-11 131 f2 = mock_fence(); 64a8f92fd783e75 Christian König 2022-03-11 132 if (!f2) { 64a8f92fd783e75 Christian König 2022-03-11 133 dma_fence_put(f1); 64a8f92fd783e75 Christian König 2022-03-11 134 return -ENOMEM; 64a8f92fd783e75 Christian König 2022-03-11 135 } 64a8f92fd783e75 Christian König 2022-03-11 136 64a8f92fd783e75 Christian König 2022-03-11 137 array = mock_array(2, f1, f2); 64a8f92fd783e75 Christian König 2022-03-11 138 if (!array) 64a8f92fd783e75 Christian König 2022-03-11 139 return -ENOMEM; 64a8f92fd783e75 Christian König 2022-03-11 140 64a8f92fd783e75 Christian König 2022-03-11 141 dma_fence_unwrap_for_each(fence, &iter, array) { 64a8f92fd783e75 Christian König 2022-03-11 142 if (fence == f1) { 64a8f92fd783e75 Christian König 2022-03-11 143 f1 = NULL; 64a8f92fd783e75 Christian König 2022-03-11 144 } else if (fence == f2) { 64a8f92fd783e75 Christian König 2022-03-11 145 f2 = NULL; 64a8f92fd783e75 Christian König 2022-03-11 146 } else { 64a8f92fd783e75 Christian König 2022-03-11 147 pr_err("Unexpected fence!\n"); 64a8f92fd783e75 Christian König 2022-03-11 @148 err = -EINVAL; 64a8f92fd783e75 Christian König 2022-03-11 149 } 64a8f92fd783e75 Christian König 2022-03-11 150 } 64a8f92fd783e75 Christian König 2022-03-11 151 64a8f92fd783e75 Christian König 2022-03-11 152 if (f1 || f2) { 64a8f92fd783e75 Christian König 2022-03-11 153 pr_err("Not all fences seen!\n"); 64a8f92fd783e75 Christian König 2022-03-11 @154 err = -EINVAL; 64a8f92fd783e75 Christian König 2022-03-11 155 } 64a8f92fd783e75 Christian König 2022-03-11 156 64a8f92fd783e75 Christian König 2022-03-11 157 dma_fence_signal(f1); 64a8f92fd783e75 Christian König 2022-03-11 158 dma_fence_signal(f2); 64a8f92fd783e75 Christian König 2022-03-11 159 dma_fence_put(array); 64a8f92fd783e75 Christian König 2022-03-11 160 return 0; 64a8f92fd783e75 Christian König 2022-03-11 161 } 64a8f92fd783e75 Christian König 2022-03-11 162 -- 0-DAY CI Kernel Test Service https://01.org/lkp