Hi Lionel, Thank you for the patch! Perhaps something to improve: url: https://github.com/0day-ci/linux/commits/Lionel-Landwerlin/drm-i915-perf-... base: git://anongit.freedesktop.org/drm-intel for-linux-next If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com&gt; smatch warnings: drivers/gpu/drm/i915/selftests/i915_perf.c:26 alloc_empty_config() warn: returning -1 instead of -ENOMEM is sloppy drivers/gpu/drm/i915/selftests/i915_perf.c:43 alloc_empty_config() warn: inconsistent returns 'perf->metrics_lock'. # https://github.com/0day-ci/linux/commit/9da4da9daea4fec31c06906294a6e64e9... git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout 9da4da9daea4fec31c06906294a6e64e9bd19783 vim +26 drivers/gpu/drm/i915/selftests/i915_perf.c 9da4da9daea4fe Lionel Landwerlin 2020-03-06 19 static int 9da4da9daea4fe Lionel Landwerlin 2020-03-06 20 alloc_empty_config(struct i915_perf *perf) 9da4da9daea4fe Lionel Landwerlin 2020-03-06 21 { 9da4da9daea4fe Lionel Landwerlin 2020-03-06 22 struct i915_oa_config *oa_config; 9da4da9daea4fe Lionel Landwerlin 2020-03-06 23 9da4da9daea4fe Lionel Landwerlin 2020-03-06 24 oa_config = kzalloc(sizeof(*oa_config), GFP_KERNEL); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 25 if (!oa_config) 9da4da9daea4fe Lionel Landwerlin 2020-03-06 @26 return -1; return -ENOMEM 9da4da9daea4fe Lionel Landwerlin 2020-03-06 27 9da4da9daea4fe Lionel Landwerlin 2020-03-06 28 oa_config->perf = perf; 9da4da9daea4fe Lionel Landwerlin 2020-03-06 29 kref_init(&oa_config->ref); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 30 9da4da9daea4fe Lionel Landwerlin 2020-03-06 31 strlcpy(oa_config->uuid, TEST_OA_CONFIG_UUID, sizeof(oa_config->uuid)); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 32 9da4da9daea4fe Lionel Landwerlin 2020-03-06 33 mutex_lock(&perf->metrics_lock); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 34 9da4da9daea4fe Lionel Landwerlin 2020-03-06 35 oa_config->id = idr_alloc(&perf->metrics_idr, oa_config, 2, 0, GFP_KERNEL); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 36 if (oa_config->id < 0) { 9da4da9daea4fe Lionel Landwerlin 2020-03-06 37 i915_oa_config_put(oa_config); unlock 9da4da9daea4fe Lionel Landwerlin 2020-03-06 38 return -1; return oa_config->id; 9da4da9daea4fe Lionel Landwerlin 2020-03-06 39 } 9da4da9daea4fe Lionel Landwerlin 2020-03-06 40 9da4da9daea4fe Lionel Landwerlin 2020-03-06 41 mutex_unlock(&perf->metrics_lock); 9da4da9daea4fe Lionel Landwerlin 2020-03-06 42 9da4da9daea4fe Lionel Landwerlin 2020-03-06 @43 return 0; 9da4da9daea4fe Lionel Landwerlin 2020-03-06 44 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org