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authorAntonino A. Daplas <adaplas@gmail.com>2005-11-07 04:00:38 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:51 -0500
commitdd0314f7bb407bc4bdb3ea769b9c8a3a5d39ffd7 (patch)
tree474e589f2d9022f8ce63993e19069da273033e55 /drivers/video/console/fbcon.c
parent3084a895c2a963cb9b32271061c832977ff7293c (diff)
[PATCH] fbcon: Initialize new driver when old driver is released
If machine has more than 1 driver installed, and they all drive the same hardware, it's possible that the driver's fb_release() method will attempt to restore the hardware state to the initial state. This will leave the new driver in an undefined state. To prevent this problem, initialize the new driver by calling fb_set_par() when the old driver is released by fbcon. Signed-off-by: Antonino Daplas<adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/console/fbcon.c')
-rw-r--r--drivers/video/console/fbcon.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
index e111a88612f7..5ff51cd0a2a9 100644
--- a/drivers/video/console/fbcon.c
+++ b/drivers/video/console/fbcon.c
@@ -630,6 +630,15 @@ static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
630 kfree(oldinfo->fbcon_par); 630 kfree(oldinfo->fbcon_par);
631 oldinfo->fbcon_par = NULL; 631 oldinfo->fbcon_par = NULL;
632 module_put(oldinfo->fbops->owner); 632 module_put(oldinfo->fbops->owner);
633 /*
634 If oldinfo and newinfo are driving the same hardware,
635 the fb_release() method of oldinfo may attempt to
636 restore the hardware state. This will leave the
637 newinfo in an undefined state. Thus, a call to
638 fb_set_par() may be needed for the newinfo.
639 */
640 if (newinfo->fbops->fb_set_par)
641 newinfo->fbops->fb_set_par(newinfo);
633 } 642 }
634 643
635 return err; 644 return err;