Hi Marek, url: https://github.com/intel-lab-lkp/linux/commits/Marek-Vasut/drm-mxsfb-Implement-LCDIF-scanout-CRC32-support/20220410-071222 base: git://anongit.freedesktop.org/drm/drm drm-next config: i386-randconfig-m021-20220411 (https://download.01.org/0day-ci/archive/20220411/202204111055.ETeht46W-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.2.0-19) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> smatch warnings: drivers/gpu/drm/mxsfb/mxsfb_kms.c:444 mxsfb_crtc_set_crc_source() warn: variable dereferenced before check 'crtc' (see line 442) vim +/crtc +444 drivers/gpu/drm/mxsfb/mxsfb_kms.c 5797982b2ba894 Marek Vasut 2022-04-10 440 static int mxsfb_crtc_set_crc_source(struct drm_crtc *crtc, const char *source) 5797982b2ba894 Marek Vasut 2022-04-10 441 { 5797982b2ba894 Marek Vasut 2022-04-10 @442 struct mxsfb_drm_private *mxsfb = to_mxsfb_drm_private(crtc->dev); ^^^^^^^^^ Dereference 5797982b2ba894 Marek Vasut 2022-04-10 443 5797982b2ba894 Marek Vasut 2022-04-10 @444 if (!crtc) ^^^^^ Checked too late 5797982b2ba894 Marek Vasut 2022-04-10 445 return -ENODEV; 5797982b2ba894 Marek Vasut 2022-04-10 446 5797982b2ba894 Marek Vasut 2022-04-10 447 if (source && strcmp(source, "auto") == 0) 5797982b2ba894 Marek Vasut 2022-04-10 448 mxsfb->crc_active = true; 5797982b2ba894 Marek Vasut 2022-04-10 449 else if (!source) 5797982b2ba894 Marek Vasut 2022-04-10 450 mxsfb->crc_active = false; 5797982b2ba894 Marek Vasut 2022-04-10 451 else 5797982b2ba894 Marek Vasut 2022-04-10 452 return -EINVAL; 5797982b2ba894 Marek Vasut 2022-04-10 453 5797982b2ba894 Marek Vasut 2022-04-10 454 return 0; 5797982b2ba894 Marek Vasut 2022-04-10 455 } -- 0-DAY CI Kernel Test Service https://01.org/lkp
