From: tony@atomide•com (Tony Lindgren)
To: linux-arm-kernel@lists•infradead.org
Subject: Boot hang regression 3.10.0-rc4 -> 3.10.0
Date: Mon, 8 Jul 2013 04:25:54 -0700 [thread overview]
Message-ID: <20130708112553.GU5523@atomide.com> (raw)
In-Reply-To: <B5906170F1614E41A8A28DE3B8D121433EE94520@DBDE04.ent.ti.com>
* Bedia, Vaibhav <vaibhav.bedia@ti•com> [130705 06:37]:
> On Fri, Jul 05, 2013 at 18:50:10, Bedia, Vaibhav wrote:
> > Hi Tony,
> >
> > On Fri, Jul 05, 2013 at 17:29:59, Tony Lindgren wrote:
> > > * Bedia, Vaibhav <vaibhav.bedia@ti•com> [130705 01:17]:
> > > >
> > > > I just checked the behavior on my AM335x-EVM. Current mainline boots fine
> > > > provided I don't use earlyprintk. The offending patch [1] in this case is the one
> > > > that tries to get rid of omap_serial_early_init() for DT boot. This change inadvertently
> > > > also results in the console UART getting reset and idled during bootup and that's where
> > > > the boot stops for you. I think if you skip earlyprintk from the bootargs you should see
> > > > the system booting fine.
> > > >
> > > > I guess we need to retain the NO_IDLE and NO_RESET aspect for the console UART in
> > > > omap_serial_early_init() to get earlyprintk working again.
> > >
> > > Hmm nothing should get idled while earlyprintk is running, and then when the
> > > serial driver kicks in it should not idle anything by default. And for DT based
> > > booting we should not have mach-omap2/serial.c initialize anything.
> > >
> >
> > If I add in the HWMOD flags without any reverts I get to the point where the serial driver
> > comes up but the boot eventually stops [1]. Without the flags the boot stops much earlier [2]
> > just like Mark reported.
> >
>
> Err.. the log with HWMOD flags added is [2] and without flags is [1]. Sorry for the confusion.
It sounds like something needs to be fixed for am33xx as omap3 and omap4
won't hang with earlyprintk. Almost certainly mach-omap2/serial.c should not
be needed at all for am33xx, and the bug is somewhere else.
> > > I wonder if this is because the timeouts get now initialized to 0 instead
> > > of -1 for the serial driver?
> > >
> >
> > You meant initialized to -1, right? There's an additional check for timeout being 0. Unless i
> > am missing something DT-boot will start off with timeout set to 0 and then get forced to -1.
OK
Regards,
Tony
next prev parent reply other threads:[~2013-07-08 11:25 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-04 13:25 Boot hang regression 3.10.0-rc4 -> 3.10.0 Mark Jackson
2013-07-04 15:14 ` Mark Jackson
2013-07-04 16:00 ` Mark Jackson
2013-07-05 8:11 ` Bedia, Vaibhav
2013-07-05 11:59 ` Tony Lindgren
2013-07-05 13:20 ` Bedia, Vaibhav
2013-07-05 13:31 ` Bedia, Vaibhav
2013-07-08 11:25 ` Tony Lindgren [this message]
2013-07-08 12:16 ` Tony Lindgren
2013-07-08 12:41 ` Rajendra Nayak
2013-07-08 13:10 ` Tony Lindgren
2013-07-08 13:20 ` Rajendra Nayak
2013-07-08 13:25 ` Rajendra Nayak
2013-07-08 13:35 ` Felipe Balbi
2013-07-09 5:33 ` Rajendra Nayak
2013-07-09 6:42 ` Felipe Balbi
2013-07-09 7:19 ` Rajendra Nayak
2013-07-09 7:40 ` Felipe Balbi
2013-07-09 18:59 ` Grygorii Strashko
2013-07-09 19:41 ` Felipe Balbi
2013-07-10 12:16 ` Grygorii Strashko
2013-07-10 12:25 ` Felipe Balbi
2013-07-10 8:22 ` Kevin Hilman
2013-07-10 12:10 ` Tony Lindgren
2013-07-10 12:27 ` Tony Lindgren
2013-07-10 14:26 ` Tony Lindgren
2013-07-10 16:07 ` Felipe Balbi
2013-07-10 16:11 ` Felipe Balbi
2013-07-11 6:32 ` Tony Lindgren
2013-07-11 9:59 ` Grygorii Strashko
2013-07-12 0:40 ` Suman Anna
2013-07-15 6:44 ` Rajendra Nayak
2013-07-15 10:01 ` Rajendra Nayak
2013-07-15 19:23 ` Suman Anna
2013-07-16 6:30 ` Rajendra Nayak
2013-07-11 9:17 ` Rajendra Nayak
2013-07-11 9:26 ` Felipe Balbi
2013-07-11 10:16 ` [PATCH] arm: omap2plus: unidle devices which are about to probe Felipe Balbi
2013-07-12 11:58 ` Grygorii Strashko
2013-07-12 12:10 ` Felipe Balbi
2013-07-12 12:27 ` Rajendra Nayak
2013-07-13 22:21 ` Kevin Hilman
2013-07-11 9:59 ` Boot hang regression 3.10.0-rc4 -> 3.10.0 Grygorii Strashko
2013-07-16 10:27 ` Grygorii Strashko
2013-07-17 7:10 ` Rajendra Nayak
2013-07-11 6:18 ` Rajendra Nayak
2013-07-11 6:24 ` Tony Lindgren
2013-07-11 9:11 ` Rajendra Nayak
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