Hi Sean, I love your patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on drm-tip/drm-tip next-20210916] [cannot apply to robh/for-next linus/master v5.15-rc1] [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] url: https://github.com/0day-ci/linux/commits/Sean-Paul/drm-hdcp-Pull-HDCP-auth-exchange-check-into-helpers/20210916-044145 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/2fc7bb157fc24840f3fe3b8ece82cea21ded8db6 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sean-Paul/drm-hdcp-Pull-HDCP-auth-exchange-check-into-helpers/20210916-044145 git checkout 2fc7bb157fc24840f3fe3b8ece82cea21ded8db6 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): drivers/gpu/drm/msm/dp/dp_debug.c: In function 'dp_hdcp_key_write': >> drivers/gpu/drm/msm/dp/dp_debug.c:361:28: error: variable 'dev' set but not used [-Werror=unused-but-set-variable] 361 | struct drm_device *dev; | ^~~ cc1: all warnings being treated as errors vim +/dev +361 drivers/gpu/drm/msm/dp/dp_debug.c 354 355 static ssize_t dp_hdcp_key_write(struct file *file, const char __user *ubuf, 356 size_t len, loff_t *offp) 357 { 358 char *input_buffer; 359 int ret = 0; 360 struct dp_debug_private *debug = file->private_data; > 361 struct drm_device *dev; 362 363 dev = debug->drm_dev; 364 365 if (len != (DRM_HDCP_KSV_LEN + DP_HDCP_NUM_KEYS * DP_HDCP_KEY_LEN)) 366 return -EINVAL; 367 368 if (!debug->hdcp) 369 return -ENOENT; 370 371 input_buffer = memdup_user_nul(ubuf, len); 372 if (IS_ERR(input_buffer)) 373 return PTR_ERR(input_buffer); 374 375 ret = dp_hdcp_ingest_key(debug->hdcp, input_buffer, len); 376 377 kfree(input_buffer); 378 if (ret < 0) { 379 DRM_ERROR("Could not ingest HDCP key, ret=%d\n", ret); 380 return ret; 381 } 382 383 *offp += len; 384 return len; 385 } 386 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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