[kbuild-all] [xlnx:master 10/20] drivers/misc/xilinx-ai-engine/ai-engine-dev.c:165:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result

tree: https://github.com/Xilinx/linux-xlnx master head: 319e5bc767fe351a63744daa9cdd69b1915956d0 commit: b4164ed1bbab5999a8b30dc25eaaa3200ff1fe59 [10/20] misc: ai-engine: Move AI engine reg access to kernel config: alpha-allyesconfig (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout b4164ed1bbab5999a8b30dc25eaaa3200ff1fe59 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): drivers/misc/xilinx-ai-engine/ai-engine-dev.c: In function 'aie_request_partition_from_id': 165 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c:175:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 175 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-dev.c: In function 'aie_enquire_partitions': drivers/misc/xilinx-ai-engine/ai-engine-dev.c:97:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 97 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -- drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_part_release': 253 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_part_ioctl': drivers/misc/xilinx-ai-engine/ai-engine-part.c:366:3: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 366 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_part_write_iter': drivers/misc/xilinx-ai-engine/ai-engine-part.c:276:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 276 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_part_read_iter': drivers/misc/xilinx-ai-engine/ai-engine-part.c:296:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 296 | mutex_lock_interruptible(&apart->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'of_aie_part_probe': drivers/misc/xilinx-ai-engine/ai-engine-part.c:514:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 514 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_create_partition': drivers/misc/xilinx-ai-engine/ai-engine-part.c:429:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 429 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c:476:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 476 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/xilinx-ai-engine/ai-engine-part.c: In function 'aie_part_release_device': drivers/misc/xilinx-ai-engine/ai-engine-part.c:401:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result] 401 | mutex_lock_interruptible(&adev->mlock); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/mutex_lock_interruptible +165 drivers/misc/xilinx-ai-engine/ai-engine-dev.c 150 151 /** 152 * aie_request_partition_from_id() - request AI engine partition from id 153 * @adev: AI engine device 154 * @partition_id: partition id 155 * @return: partition pointer if partition exists, otherwise, NULL. 156 * 157 * This function finds a defined partition which matches the specified 158 * partition id, request it by increasing the refcount, and returns it. 159 */ 160 struct aie_partition *aie_request_partition_from_id(struct aie_device *adev, 161 u32 partition_id) 162 { 163 struct aie_partition *apart; 164 166 apart = aie_get_partition_from_id(adev, partition_id); 167 if (!apart) { 168 dev_err(&adev->dev, 169 "request partition %u failed, not exist.\n", 170 partition_id); 171 mutex_unlock(&adev->mlock); 172 return ERR_PTR(-EINVAL); 173 } 174 175 mutex_lock_interruptible(&apart->mlock); 176 if (apart->status & XAIE_PART_STATUS_INUSE) { 177 mutex_unlock(&apart->mlock); 178 dev_err(&adev->dev, 179 "request partition %u failed, partition in use.\n", 180 partition_id); 181 apart = ERR_PTR(-EBUSY); 182 } else { 183 /* 184 * TBD: 185 * 1. setup NOC AXI MM config to only generate error events 186 * for slave error and decode error. 187 * 2. scan to see which tiles have been clock gated. 188 * 189 * This needs to be done before the AI engine partition is 190 * exported for user to access. 191 */ 192 apart->status = XAIE_PART_STATUS_INUSE; 193 mutex_unlock(&apart->mlock); 194 } 195 mutex_unlock(&adev->mlock); 196 197 return apart; 198 } 199 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org