6:39 p.m.
tree: https://github.com/intel/linux-intel-lts.git 5.4/yocto
head: 8e2b1510d279aecb1f89907553283c79c1b2b226
commit: 8e2b1510d279aecb1f89907553283c79c1b2b226 [5/5] drm/edid: Fix DispID tile parsing
for override EDID
config: i386-randconfig-m021-20210517 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
Reported-by: Dan Carpenter <dan.carpenter(a)oracle.com>
New smatch warnings:
drivers/gpu/drm/drm_edid.c:5597 drm_update_tile_info() error: uninitialized symbol
'length'.
drivers/gpu/drm/drm_edid.c:5597 drm_update_tile_info() error: uninitialized symbol
'idx'.
Old smatch warnings:
drivers/gpu/drm/drm_edid.c:1485 drm_edid_are_equal() error: we previously assumed
'edid2' could be null (see line 1478)
vim +/length +5597 drivers/gpu/drm/drm_edid.c
8e2b1510d279ae Ville Syrjälä 2020-03-13 5584 void drm_update_tile_info(struct
drm_connector *connector,
8e2b1510d279ae Ville Syrjälä 2020-03-13 5585 const struct edid *edid)
40d9b043a89e23 Dave Airlie 2014-10-20 5586 {
8e2b1510d279ae Ville Syrjälä 2020-03-13 5587 const void *displayid = NULL;
8e2b1510d279ae Ville Syrjälä 2020-03-13 5588 int length, idx;
^^^^^^^^^^^^^^^
40d9b043a89e23 Dave Airlie 2014-10-20 5589 int ret;
40d9b043a89e23 Dave Airlie 2014-10-20 5590 connector->has_tile = false;
40d9b043a89e23 Dave Airlie 2014-10-20 5591 displayid =
drm_find_displayid_extension(edid);
40d9b043a89e23 Dave Airlie 2014-10-20 5592 if (!displayid) {
40d9b043a89e23 Dave Airlie 2014-10-20 5593 /* drop reference to any tile group we
had */
40d9b043a89e23 Dave Airlie 2014-10-20 5594 goto out_drop_ref;
40d9b043a89e23 Dave Airlie 2014-10-20 5595 }
40d9b043a89e23 Dave Airlie 2014-10-20 5596
8e2b1510d279ae Ville Syrjälä 2020-03-13 @5597 ret = drm_displayid_parse_tiled(connector,
displayid, length, idx);
^^^^^^^^^^^
Uninitialized.
---
0-DAY CI Kernel Test Service, Intel Corporation
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