Hi Len, kernel test robot noticed the following build warnings:
[auto build test WARNING on linus/master] [also build test WARNING on v6.16-rc4 next-20250704] [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/Len-Bao/drm-dp-Remove-dead-code-after-return-statement/20250707-002653 base: linus/master patch link: https://lore.kernel.org/r/20250706162431.15029-1-len.bao%40gmx.us patch subject: [PATCH] drm/dp: Remove dead code after return statement config: arm-randconfig-002-20250707 (https://download.01.org/0day-ci/archive/20250707/[email protected]/config) compiler: arm-linux-gnueabi-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250707/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): drivers/gpu/drm/display/drm_dp_helper.c: In function 'drm_dp_pcon_frl_configure_2': >> drivers/gpu/drm/display/drm_dp_helper.c:3580:13: warning: unused variable >> 'ret' [-Wunused-variable] 3580 | int ret; | ^~~ vim +/ret +3580 drivers/gpu/drm/display/drm_dp_helper.c ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3565 ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3566 /** ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3567 * drm_dp_pcon_frl_configure_2() - Set HDMI Link configuration Step-2 ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3568 * @aux: DisplayPort AUX channel ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3569 * @max_frl_mask : Max FRL BW to be tried by the PCON with HDMI Sink 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3570 * @frl_type : FRL training type, can be Extended, or Normal. 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3571 * In Normal FRL training, the PCON tries each frl bw from the max_frl_mask 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3572 * starting from min, and stops when link training is successful. In Extended 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3573 * FRL training, all frl bw selected in the mask are trained by the PCON. ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3574 * ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3575 * Returns 0 if success, else returns negative error code. ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3576 */ ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3577 int drm_dp_pcon_frl_configure_2(struct drm_dp_aux *aux, int max_frl_mask, 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3578 u8 frl_type) ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3579 { ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 @3580 int ret; ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3581 u8 buf = max_frl_mask; ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3582 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3583 if (frl_type == DP_PCON_FRL_LINK_TRAIN_EXTENDED) ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3584 buf |= DP_PCON_FRL_LINK_TRAIN_EXTENDED; 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3585 else 68a8c645b2538c drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2021-03-23 3586 buf &= ~DP_PCON_FRL_LINK_TRAIN_EXTENDED; ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3587 af67978ee37e54 drivers/gpu/drm/display/drm_dp_helper.c Dmitry Baryshkov 2025-03-24 3588 return drm_dp_dpcd_write_byte(aux, DP_PCON_HDMI_LINK_CONFIG_2, buf); ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3589 } ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3590 EXPORT_SYMBOL(drm_dp_pcon_frl_configure_2); ce32a6239de648 drivers/gpu/drm/drm_dp_helper.c Ankit Nautiyal 2020-12-18 3591 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
