drivers/gpu/drm/amd/amdkfd/kfd_chardev.c:77:2-8: preceding lock on line 73

BCC: [email protected]
CC: [email protected]
CC: [email protected]
TO: Han Gao <[email protected]>
CC: Alex Deucher <[email protected]>
CC: Felix Kuehling <[email protected]>

Hi Han,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d2c9a99135da931377240942d44f3dea104cedb8
commit: fa301127ba9a22f40b4261f569f1fc8b3d66e04e drm/amdkfd: enable kfd on LoongArch systems
date:   12 months ago
:::::: branch date: 5 hours ago
:::::: commit date: 12 months ago
config: loongarch-randconfig-r062-20260703 (https://download.01.org/0day-ci/archive/20260703/[email protected]/config)
compiler: loongarch64-linux-gcc (GCC) 16.1.0

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: fa301127ba9a ("drm/amdkfd: enable kfd on LoongArch systems")
| Reported-by: kernel test robot <[email protected]>
| Reported-by: Julia Lawall <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

cocci warnings: (new ones prefixed by >>)
>> drivers/gpu/drm/amd/amdkfd/kfd_chardev.c:77:2-8: preceding lock on line 73

vim +77 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

4a488a7ad714011 Oded Gabbay     2014-07-16  68  
9731dd4cadc5325 Daniel Phillips 2022-05-30  69  static inline struct kfd_process_device *kfd_lock_pdd_by_id(struct kfd_process *p, __u32 gpu_id)
9731dd4cadc5325 Daniel Phillips 2022-05-30  70  {
9731dd4cadc5325 Daniel Phillips 2022-05-30  71  	struct kfd_process_device *pdd;
9731dd4cadc5325 Daniel Phillips 2022-05-30  72  
9731dd4cadc5325 Daniel Phillips 2022-05-30 @73  	mutex_lock(&p->mutex);
9731dd4cadc5325 Daniel Phillips 2022-05-30  74  	pdd = kfd_process_device_data_by_id(p, gpu_id);
9731dd4cadc5325 Daniel Phillips 2022-05-30  75  
9731dd4cadc5325 Daniel Phillips 2022-05-30  76  	if (pdd)
9731dd4cadc5325 Daniel Phillips 2022-05-30 @77  		return pdd;
9731dd4cadc5325 Daniel Phillips 2022-05-30  78  
9731dd4cadc5325 Daniel Phillips 2022-05-30  79  	mutex_unlock(&p->mutex);
9731dd4cadc5325 Daniel Phillips 2022-05-30  80  	return NULL;
9731dd4cadc5325 Daniel Phillips 2022-05-30  81  }
9731dd4cadc5325 Daniel Phillips 2022-05-30  82  

:::::: The code at line 77 was first introduced by commit
:::::: 9731dd4cadc53251ef80b3655c8d841fed52fa3d drm/amdkfd: Add available memory ioctl

:::::: TO: Daniel Phillips <[email protected]>
:::::: CC: Alex Deucher <[email protected]>

--
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https://github.com/intel/lkp-tests/wiki