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| author | Michal Januszewski <spock@gentoo.org> | 2009-03-31 15:25:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-01 08:59:33 -0700 |
| commit | 23b736545473ed853b685cbc03883aa6ff3f0e0d (patch) | |
| tree | dbc04a8fc5765f6832085909e6b5247511c33fed /drivers/video | |
| parent | ddb53d48da5b0e691f35e703ac29118747f86c99 (diff) | |
| download | linux-23b736545473ed853b685cbc03883aa6ff3f0e0d.tar.gz | |
uvesafb: fix selecting mode with the vbemode option
If the vbemode option is used, uvesafb calls fb_get_mode() without first setting the resolution in info->var. This results in a division by zero in fb_get_mode(), as evidenced e.g. in [1]. Fix this by ensuring the info->var structure is populated before fb_get_mode() is called. [1] http://bugzilla.kernel.org/show_bug.cgi?id=11661#c37 Signed-off-by: Michal Januszewski <spock@gentoo.org> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/uvesafb.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c index c288270e42f7..0b370aebdbfd 100644 --- a/drivers/video/uvesafb.c +++ b/drivers/video/uvesafb.c @@ -850,14 +850,16 @@ static int __devinit uvesafb_vbe_init_mode(struct fb_info *info) if (vbemode) { for (i = 0; i < par->vbe_modes_cnt; i++) { if (par->vbe_modes[i].mode_id == vbemode) { + modeid = i; + uvesafb_setup_var(&info->var, info, + &par->vbe_modes[modeid]); fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, - &info->var, info); + &info->var, info); /* * With pixclock set to 0, the default BIOS * timings will be used in set_par(). */ info->var.pixclock = 0; - modeid = i; goto gotmode; } } @@ -904,8 +906,11 @@ static int __devinit uvesafb_vbe_init_mode(struct fb_info *info) fb_videomode_to_var(&info->var, mode); } else { modeid = par->vbe_modes[0].mode_id; + uvesafb_setup_var(&info->var, info, + &par->vbe_modes[modeid]); fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, - &info->var, info); + &info->var, info); + goto gotmode; } } @@ -917,9 +922,9 @@ static int __devinit uvesafb_vbe_init_mode(struct fb_info *info) if (modeid == -1) return -EINVAL; -gotmode: uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]); +gotmode: /* * If we are not VBE3.0+ compliant, we're done -- the BIOS will * ignore our timings anyway. |