[drm-intel:drm-intel-gt-next 29/29] drivers/gpu/drm/i915/gem/i915_gem_wait.c:136 i915_gem_fence_wait_priority() warn: ignoring unreachable code.

[drm-intel:drm-intel-gt-next 29/29] drivers/gpu/drm/i915/gem/i915_gem_wait.c:136 i915_gem_fence_wait_priority() warn: ignoring unreachable code.

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: intel-gfx(a)lists.freedesktop.org
CC: dri-devel(a)lists.freedesktop.org
TO: Chris Wilson <chris@chris-wilson.co.uk>
CC: "Ville Syrjälä" <ville.syrjala@linux.intel.com>

tree:   git://anongit.freedesktop.org/drm-intel drm-intel-gt-next
head:   f99e67f1b929635655ff8419e36751f3bf44f1ae
commit: f99e67f1b929635655ff8419e36751f3bf44f1ae [29/29] drm/i915/display: Apply interactive priority to explicit flip fences
:::::: branch date: 8 hours ago
:::::: commit date: 8 hours ago
config: x86_64-randconfig-m001-20210120 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>

New smatch warnings:
drivers/gpu/drm/i915/gem/i915_gem_wait.c:136 i915_gem_fence_wait_priority() warn: ignoring unreachable code.

Old smatch warnings:
drivers/gpu/drm/i915/gem/i915_gem_wait.c:205 nsecs_to_jiffies_timeout() warn: should this be a bitwise op?

vim +136 drivers/gpu/drm/i915/gem/i915_gem_wait.c

f99e67f1b92963 Chris Wilson 2021-01-19  116  
f99e67f1b92963 Chris Wilson 2021-01-19  117  void i915_gem_fence_wait_priority(struct dma_fence *fence,
d45a1a533499d3 Chris Wilson 2019-05-28  118  				  const struct i915_sched_attr *attr)
d45a1a533499d3 Chris Wilson 2019-05-28  119  {
f99e67f1b92963 Chris Wilson 2021-01-19  120  	if (dma_fence_is_signaled(fence))
f99e67f1b92963 Chris Wilson 2021-01-19  121  		return;
f99e67f1b92963 Chris Wilson 2021-01-19  122  
f99e67f1b92963 Chris Wilson 2021-01-19  123  	local_bh_disable();
f99e67f1b92963 Chris Wilson 2021-01-19  124  
d45a1a533499d3 Chris Wilson 2019-05-28  125  	/* Recurse once into a fence-array */
d45a1a533499d3 Chris Wilson 2019-05-28  126  	if (dma_fence_is_array(fence)) {
d45a1a533499d3 Chris Wilson 2019-05-28  127  		struct dma_fence_array *array = to_dma_fence_array(fence);
d45a1a533499d3 Chris Wilson 2019-05-28  128  		int i;
d45a1a533499d3 Chris Wilson 2019-05-28  129  
d45a1a533499d3 Chris Wilson 2019-05-28  130  		for (i = 0; i < array->num_fences; i++)
f99e67f1b92963 Chris Wilson 2021-01-19  131  			fence_set_priority(array->fences[i], attr);
f99e67f1b92963 Chris Wilson 2021-01-19  132  	} else if (__dma_fence_is_chain(fence)) {
f99e67f1b92963 Chris Wilson 2021-01-19  133  		struct dma_fence *iter;
f99e67f1b92963 Chris Wilson 2021-01-19  134  
f99e67f1b92963 Chris Wilson 2021-01-19  135  		/* The chain is ordered; if we boost the last, we boost all */
f99e67f1b92963 Chris Wilson 2021-01-19 @136  		dma_fence_chain_for_each(iter, fence) {
f99e67f1b92963 Chris Wilson 2021-01-19  137  			fence_set_priority(to_dma_fence_chain(iter)->fence,
f99e67f1b92963 Chris Wilson 2021-01-19  138  					   attr);
f99e67f1b92963 Chris Wilson 2021-01-19  139  			break;
f99e67f1b92963 Chris Wilson 2021-01-19  140  		}
f99e67f1b92963 Chris Wilson 2021-01-19  141  		dma_fence_put(iter);
d45a1a533499d3 Chris Wilson 2019-05-28  142  	} else {
f99e67f1b92963 Chris Wilson 2021-01-19  143  		fence_set_priority(fence, attr);
d45a1a533499d3 Chris Wilson 2019-05-28  144  	}
f99e67f1b92963 Chris Wilson 2021-01-19  145  
f99e67f1b92963 Chris Wilson 2021-01-19  146  	local_bh_enable(); /* kick the tasklets if queues were reprioritised */
d45a1a533499d3 Chris Wilson 2019-05-28  147  }
d45a1a533499d3 Chris Wilson 2019-05-28  148  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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