diff options
| author | Jonathan Gray <jsg@cvs.openbsd.org> | 2020-08-26 12:47:36 +0000 |
|---|---|---|
| committer | Jonathan Gray <jsg@cvs.openbsd.org> | 2020-08-26 12:47:36 +0000 |
| commit | 0f544ff9c9b61085a505edf8e8dbd05cdfad08b4 (patch) | |
| tree | b740f82b35c627498683d00e99a551a067f7581b /sys | |
| parent | ed5b51aca5cceb406f428abc2ab8b92a65c97845 (diff) | |
drm/amd/display: fix pow() crashing when given base 0
From Krunoslav Kovac
b9d077f3781412f304968cf806f636ee91b4470e in linux 5.7.y/5.7.18
d2e59d0ff4c44d1f6f8ed884a5bea7d1bb7fd98c in mainline linux
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/dev/pci/drm/amd/display/include/fixed31_32.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/dev/pci/drm/amd/display/include/fixed31_32.h b/sys/dev/pci/drm/amd/display/include/fixed31_32.h index 89ef9f6860e..16df2a485dd 100644 --- a/sys/dev/pci/drm/amd/display/include/fixed31_32.h +++ b/sys/dev/pci/drm/amd/display/include/fixed31_32.h @@ -431,6 +431,9 @@ struct fixed31_32 dc_fixpt_log(struct fixed31_32 arg); */ static inline struct fixed31_32 dc_fixpt_pow(struct fixed31_32 arg1, struct fixed31_32 arg2) { + if (arg1.value == 0) + return arg2.value == 0 ? dc_fixpt_one : dc_fixpt_zero; + return dc_fixpt_exp( dc_fixpt_mul( dc_fixpt_log(arg1), |