[xlnx:master 12/20] drivers/misc/xilinx-ai-engine/ai-engine-fpga.c:21:2: 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: e24d5dbb603552c4cb9c9e946c78055a60f83d85 [12/20] misc: ai-engine: Add FPGA bridge to AI engine partition
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 e24d5dbb603552c4cb9c9e946c78055a60f83d85
        # 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-fpga.c: In function 'aie_fpga_bridge_enable_set':

quoted

drivers/misc/xilinx-ai-engine/ai-engine-fpga.c:21:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result]

21 |  mutex_lock_interruptible(&apart->mlock);
|  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/misc/xilinx-ai-engine/ai-engine-fpga.c: In function 'aie_fpga_bridge_enable_show':
drivers/misc/xilinx-ai-engine/ai-engine-fpga.c:35:2: warning: ignoring return value of 'mutex_lock_interruptible', declared with attribute warn_unused_result [-Wunused-result]
35 |  mutex_lock_interruptible(&apart->mlock);
|  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

vim +/mutex_lock_interruptible +21 drivers/misc/xilinx-ai-engine/ai-engine-fpga.c

     9	
    10	static int aie_fpga_bridge_enable_set(struct fpga_bridge *bridge, bool enable)
    11	{
    12		struct aie_partition *apart = bridge->priv;
    13	
    14		/*
    15		 * TBD:
    16		 * "Enable" should enable the SHIM tile configuration.
    17		 * "Disable" should should disable SHIM DMAs, and wait
    18		 * until SHIM DMA stops, and disable SHIM
    19		 * to PL streams within partition.
    20		 */
  > 21		mutex_lock_interruptible(&apart->mlock);
    22		if (enable)
    23			apart->status |= XAIE_PART_STATUS_BRIDGE_ENABLED;
    24		else
    25			apart->status &= ~XAIE_PART_STATUS_BRIDGE_ENABLED;
    26		mutex_unlock(&apart->mlock);
    27		return 0;
    28	}
    29	

---
0-DAY CI Kernel Test Service, Intel Corporation
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