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fbdev: save the activate field before calling fb_check_var()

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Some drivers may reset the var->activate field on fb_check_var(). This can
lead to undefined behavior. For example, doing fbset -a <option> with vga16fb
will only modify the active console instead of modifying all.

Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonino A. Daplas 2007-05-08 00:39:22 -07:00 committed by Linus Torvalds
parent 38b4982c63
commit 4941cb7a18
1 changed files with 3 additions and 1 deletions
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4
drivers/video/fbmem.c
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@ -803,6 +803,8 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
if ((var->activate & FB_ACTIVATE_FORCE) ||
memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
u32 activate = var->activate;
if (!info->fbops->fb_check_var) {
*var = info->var;
return 0;
@ -831,7 +833,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
if (!err && (flags & FBINFO_MISC_USEREVENT)) {
struct fb_event event;
int evnt = (var->activate & FB_ACTIVATE_ALL) ?
int evnt = (activate & FB_ACTIVATE_ALL) ?
FB_EVENT_MODE_CHANGE_ALL :
FB_EVENT_MODE_CHANGE;