From 3edea4833a1efcd43e1dff082bc8001fdfe74b34 Mon Sep 17 00:00:00 2001 From: "Antonino A. Daplas" Date: Mon, 15 Aug 2005 21:29:11 +0800 Subject: [PATCH] [PATCH] intelfb/fbdev: Save info->flags in a local variable Reported by: Pavel Kysilka (Bugzilla Bug 5059) The intelfb driver does not keep resolution set with fbset after switching to anot console and back. Steps to reproduce: initial options: tty1,tty2 - 1024x768-60 1) tty1 - fbset after booting (1024x768-60) 2) tty1 - fbset 800x600-100 tty1: 800x600-100 3) swith to tty2, swith to tty1 tty1: 1024x768-60 (the same resolution as default from kernel booting) This bug is caused by intelfb unintentionally destroying info->flags in set_par(). Therefore the flag, FBINFO_MISC_USEREVENT used to notify fbcon of a mode change was cleared causing the above problem. This bug though is not intelfb specific, as other drivers may also be affected. The fix is to save info->flags in a local variable before calling any of the driver hooks. A more definitive fix (for post 2.6.13) is to separate info->flags into one that is set by the driver and another that is set by core fbdev/fbcon. Signed-off-by: Antonino Daplas Signed-off-by: Linus Torvalds --- drivers/video/fbmem.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index d2e19f6..4ff853f 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -628,7 +628,7 @@ fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) { - int err; + int err, flags = info->flags; if (var->activate & FB_ACTIVATE_INV_MODE) { struct fb_videomode mode1, mode2; @@ -682,7 +682,7 @@ fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) !list_empty(&info->modelist)) err = fb_add_videomode(&mode, &info->modelist); - if (!err && info->flags & FBINFO_MISC_USEREVENT) { + if (!err && (flags & FBINFO_MISC_USEREVENT)) { struct fb_event event; info->flags &= ~FBINFO_MISC_USEREVENT; -- 2.7.4