evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge "mdss: mdp: Fix fudge factor overflow check"

Browse source
This commit is contained in:
Linux Build Service Account 2018-09-28 05:48:49 -07:00 • committed by Gerrit - the friendly Code Review server
commit ff19c63f48
1 changed files with 3 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/video/fbdev/msm/mdss_mdp_ctl.c
View file

@ -77,13 +77,15 @@ static inline u64 fudge_factor(u64 val, u32 numer, u32 denom)
u64 result = val; u64 result = val;
if (val) { if (val) {
u64 temp = -1UL; u64 temp = U64_MAX;
do_div(temp, val); do_div(temp, val);
if (temp > numer) { if (temp > numer) {
/* no overflow, so we can do the operation*/ /* no overflow, so we can do the operation*/
result = (val * (u64)numer); result = (val * (u64)numer);
do_div(result, denom); do_div(result, denom);
} else {
pr_warn("Overflow, skip fudge factor\n");
} }
} }
return result; return result;