From a9e60e5c3c4721dd216047e4c58c4eb89789f519 Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Wed, 14 Nov 2007 16:59:02 -0800 Subject: 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: Adrian Bunk Cc: Thomas Winischhofer Cc: "Antonino A. Daplas" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/sis/sis_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/video/sis') diff --git a/drivers/video/sis/sis_main.c b/drivers/video/sis/sis_main.c index bc7d23683735..37bd24b8d83b 100644 --- a/drivers/video/sis/sis_main.c +++ b/drivers/video/sis/sis_main.c @@ -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; -- cgit v1.2.1