Messages in this thread Patch in this message | | | Date | Tue, 16 Sep 2008 23:39:16 +0200 | From | Krzysztof Helt <> | Subject | Re: [Linux-fbdev-devel] [fbdev] Lockdep error |
| |
On Mon, 15 Sep 2008 16:21:52 +0400 Dmitry Baryshkov <dbaryshkov@gmail.com> wrote:
> Hi, > > After doing > # echo 1 > /sys/class/graphics/fb0/blank > I got the following in my kernel log: > > ============================================= > [ INFO: possible recursive locking detected ] > 2.6.27-rc6-00086-gda63874-dirty #97 > --------------------------------------------- > echo/1564 is trying to acquire lock: > ((fb_notifier_list).rwsem){..--}, at: [<c005a384>] __blocking_notifier_call_chain+0x38/0x6c >
Does the patch below fix the problem for you?
Kind regards, Krzysztof
diff -urp linux-ref/drivers/video/console/fbcon.c linux-mm/drivers/video/console/fbcon.c --- linux-ref/drivers/video/console/fbcon.c 2008-09-05 23:38:47.000000000 +0200 +++ linux-mm/drivers/video/console/fbcon.c 2008-09-16 23:30:52.309604454 +0200 @@ -2400,11 +2400,15 @@ static int fbcon_blank(struct vc_data *v if (!fbcon_is_inactive(vc, info)) { if (ops->blank_state != blank) { + int ret = 1; + ops->blank_state = blank; fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); ops->cursor_flash = (!blank); - if (fb_blank(info, blank)) + if (info->fbops->fb_blank) + ret = info->fbops->fb_blank(blank, info); + if (ret) fbcon_generic_blank(vc, info, blank); }
| |