Messages in this thread | | | Date | Tue, 23 Sep 2008 13:53:14 +0400 | From | Dmitry <> | Subject | Re: [Linux-fbdev-devel] [fbdev] Lockdep error |
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2008/9/17 Krzysztof Helt <krzysztof.h1@wp.pl>: > 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?
Sorry for the delay. Yes, the patch does fix the issue for me. Thank 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); > } > >
-- With best wishes Dmitry
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