Re: [PATCH 2/2] drm/amdgpu: implement page_flip_timeout() support

[kernel test robot <lkp@intel.com>]

Hi Hamza,

kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on drm/drm-next drm-i915/for-linux-next drm-i915/for-linux-next-fixes drm-tip/drm-tip linus/master v6.19-rc6 next-20260122]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Hamza-Mahfooz/drm-amdgpu-implement-page_flip_timeout-support/20260123-085944
base:   https://gitlab.freedesktop.org/drm/misc/kernel.git drm-misc-next
patch link:    https://lore.kernel.org/r/20260123000537.2450496-2-someguy%40effective-light.com
patch subject: [PATCH 2/2] drm/amdgpu: implement page_flip_timeout() support
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20260123/202601232007.NAxTeBna-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260123/202601232007.NAxTeBna-lkp@intel.com/reproduce)

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
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601232007.NAxTeBna-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c:348:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
     348 |         default:
         |         ^
   drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c:348:2: note: insert '__attribute__((fallthrough));' to silence this warning
     348 |         default:
         |         ^
         |         __attribute__((fallthrough)); 
   drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c:348:2: note: insert 'break;' to avoid fall-through
     348 |         default:
         |         ^
         |         break; 
   1 warning generated.


vim +348 drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c

2656e1ce783a90 Eric Huang    2024-06-03  315  
2656e1ce783a90 Eric Huang    2024-06-03  316  void amdgpu_reset_get_desc(struct amdgpu_reset_context *rst_ctxt, char *buf,
2656e1ce783a90 Eric Huang    2024-06-03  317  			   size_t len)
2656e1ce783a90 Eric Huang    2024-06-03  318  {
2656e1ce783a90 Eric Huang    2024-06-03  319  	if (!buf || !len)
2656e1ce783a90 Eric Huang    2024-06-03  320  		return;
2656e1ce783a90 Eric Huang    2024-06-03  321  
2656e1ce783a90 Eric Huang    2024-06-03  322  	switch (rst_ctxt->src) {
2656e1ce783a90 Eric Huang    2024-06-03  323  	case AMDGPU_RESET_SRC_JOB:
2656e1ce783a90 Eric Huang    2024-06-03  324  		if (rst_ctxt->job) {
7bed1df814cd61 Eric Huang    2024-06-06  325  			snprintf(buf, len, "job hang on ring:%s",
7bed1df814cd61 Eric Huang    2024-06-06  326  				 rst_ctxt->job->base.sched->name);
2656e1ce783a90 Eric Huang    2024-06-03  327  		} else {
2656e1ce783a90 Eric Huang    2024-06-03  328  			strscpy(buf, "job hang", len);
2656e1ce783a90 Eric Huang    2024-06-03  329  		}
2656e1ce783a90 Eric Huang    2024-06-03  330  		break;
2656e1ce783a90 Eric Huang    2024-06-03  331  	case AMDGPU_RESET_SRC_RAS:
2656e1ce783a90 Eric Huang    2024-06-03  332  		strscpy(buf, "RAS error", len);
2656e1ce783a90 Eric Huang    2024-06-03  333  		break;
2656e1ce783a90 Eric Huang    2024-06-03  334  	case AMDGPU_RESET_SRC_MES:
2656e1ce783a90 Eric Huang    2024-06-03  335  		strscpy(buf, "MES hang", len);
2656e1ce783a90 Eric Huang    2024-06-03  336  		break;
2656e1ce783a90 Eric Huang    2024-06-03  337  	case AMDGPU_RESET_SRC_HWS:
2656e1ce783a90 Eric Huang    2024-06-03  338  		strscpy(buf, "HWS hang", len);
2656e1ce783a90 Eric Huang    2024-06-03  339  		break;
2656e1ce783a90 Eric Huang    2024-06-03  340  	case AMDGPU_RESET_SRC_USER:
2656e1ce783a90 Eric Huang    2024-06-03  341  		strscpy(buf, "user trigger", len);
2656e1ce783a90 Eric Huang    2024-06-03  342  		break;
c5da9e9c023893 Alex Deucher  2025-04-16  343  	case AMDGPU_RESET_SRC_USERQ:
c5da9e9c023893 Alex Deucher  2025-04-16  344  		strscpy(buf, "user queue trigger", len);
c5da9e9c023893 Alex Deucher  2025-04-16  345  		break;
7136aabf196b0a Hamza Mahfooz 2026-01-22  346  	case AMDGPU_RESET_SRC_DISPLAY:
7136aabf196b0a Hamza Mahfooz 2026-01-22  347  		strscpy(buf, "display hang", len);
2656e1ce783a90 Eric Huang    2024-06-03 @348  	default:
2656e1ce783a90 Eric Huang    2024-06-03  349  		strscpy(buf, "unknown", len);
2656e1ce783a90 Eric Huang    2024-06-03  350  	}
2656e1ce783a90 Eric Huang    2024-06-03  351  }
a86e0c0e94373a Lijo Lazar    2024-11-15  352  

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