Commit a9e60e5c authored by Adrian Bunk's avatar Adrian Bunk Committed by Linus Torvalds

video/sis/: fix negative array index

This patch fixes the possible usage of a negative value as an array
index spotted by the Coverity checker.

sisfb_validate_mode() could return a negative error code and we must check for
that prior to using its return value as an array index.
Signed-off-by: default avatarAdrian Bunk <>
Cc: Thomas Winischhofer <>
Cc: "Antonino A. Daplas" <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 43054412
......@@ -1248,7 +1248,6 @@ sisfb_do_set_var(struct fb_var_screeninfo *var, int isactive, struct fb_info *in
if(found_mode) {
ivideo->sisfb_mode_idx = sisfb_validate_mode(ivideo,
ivideo->sisfb_mode_idx, ivideo->currentvbflags);
ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];
} else {
ivideo->sisfb_mode_idx = -1;
......@@ -1260,6 +1259,8 @@ sisfb_do_set_var(struct fb_var_screeninfo *var, int isactive, struct fb_info *in
return -EINVAL;
ivideo->mode_no = sisbios_mode[ivideo->sisfb_mode_idx].mode_no[ivideo->mni];
if(sisfb_search_refresh_rate(ivideo, ivideo->refresh_rate, ivideo->sisfb_mode_idx) == 0) {
ivideo->rate_idx = sisbios_mode[ivideo->sisfb_mode_idx].rate_idx;
ivideo->refresh_rate = 60;
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment