[Intel-gfx] [PATCH v11 06/10] drm/i915/perf: implement active wait for noa configurations

[Lionel Landwerlin]

On 28/08/2019 22:39, Chris Wilson wrote:
> Quoting kbuild test robot (2019-08-28 20:34:14)
>> Hi Lionel,
>>
>> Thank you for the patch! Perhaps something to improve:
>>
>> [auto build test WARNING on drm-intel/for-linux-next]
>> [cannot apply to v5.3-rc6 next-20190828]
>> [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
>>
>> url:    https://github.com/0day-ci/linux/commits/Lionel-Landwerlin/drm-i915-Vulkan-performance-query-support/20190829-020841
>> base:   git://anongit.freedesktop.org/drm-intel for-linux-next
>> config: i386-defconfig (attached as .config)
>> compiler: gcc-7 (Debian 7.4.0-11) 7.4.0
>> reproduce:
>>          # save the attached .config to linux build tree
>>          make ARCH=i386
>>
>> If you fix the issue, kindly add following tag
>> Reported-by: kbuild test robot <lkp at intel.com>
>>
>> All warnings (new ones prefixed by >>):
>>
>>     drivers/gpu/drm/i915/i915_debugfs.c: In function 'i915_perf_noa_delay_set':
>>>> drivers/gpu/drm/i915/i915_debugfs.c:3588:18: warning: left shift count >= width of type [-Wshift-count-overflow]
>>       if (val > ((1ul << 32) - 1) * RUNTIME_INFO(i915)->cs_timestamp_frequency_khz)
>>                       ^~
>>
>> vim +3588 drivers/gpu/drm/i915/i915_debugfs.c
>>
>>    3575
>>    3576  DEFINE_SIMPLE_ATTRIBUTE(i915_wedged_fops,
>>    3577                          i915_wedged_get, i915_wedged_set,
>>    3578                          "%llu\n");
>>    3579
>>    3580  static int
>>    3581  i915_perf_noa_delay_set(void *data, u64 val)
>>    3582  {
>>    3583          struct drm_i915_private *i915 = data;
>>    3584
>>    3585          /* This would lead to infinite waits as we're doing timestamp
>>    3586           * difference on the CS with only 32bits.
>>    3587           */
>>> 3588          if (val > ((1ul << 32) - 1) * RUNTIME_INFO(i915)->cs_timestamp_frequency_khz)
> if (val > mul_u32_u32(U32_MAX, RUNTIME_INFO(i915)->cs_timestamp_frequency_khz))


Thanks, fixed!


>
>>    3589                  return -EINVAL;
>>    3590
>>    3591          atomic64_set(&i915->perf.noa_programming_delay, val);
>>    3592          return 0;
>>    3593  }
>>    3594
>>
>> ---
>> 0-DAY kernel test infrastructure                Open Source Technology Center
>> https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
>>
>>
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