[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 <redacted>

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':

quoted

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 [-Wunused-result]

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':

quoted

drivers/misc/xilinx-ai-engine/ai-engine-part.c:253:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result]

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	
 > 165		mutex_lock_interruptible(&adev->mlock);
   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	

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