linux-kernel - Re: [PATCH][RESEND][TRIVIAL] Turn bothersome error into a debug message

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Message-ID: <544E4F3C.1010509@xs4all.nl>
Date:	Mon, 27 Oct 2014 14:57:16 +0100
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Johann Klammer <klammerj@...net>
CC:	m.chehab@...sung.com, linux-media@...r.kernel.org,
	linux-kernel@...r.kernel.org, trivial@...nel.org
Subject: Re: [PATCH][RESEND][TRIVIAL] Turn bothersome error into a debug message

Hi Johann,

I've added this to my todo list and will look at this soon (next Friday or Monday
most likely).

	Hans

On 10/27/2014 02:44 PM, Johann Klammer wrote:
> Let's see if that works now...
> 
> On 09/30/2014 07:21 PM, Johann Klammer wrote:
>> Hello,
>>
>> After updating the kernel to 3.14.15 I am seeing these messages:
>>
>> [273684.964081] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273690.020061] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273695.076082] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273700.132077] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273705.188070] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273710.244066] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273715.300187] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273720.356068] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273725.412188] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273730.468094] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273735.524070] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>> [273740.580176] saa7146: saa7146 (0): saa7146_wait_for_debi_done_sleep
>> timed out while waiting for registers getting programmed
>>
>> filling up the logs(one about every 5 seconds).
>>
>> The TV card is a Terratec Cinergy 1200 DVBS (I believe.. it's rather old).
>>
>> I can not observe any erratic behavior, just those pesky messages...
>>
>> I see there was an earlier post here in 2008 about a similar
>> problem...(Cinergy 1200 DVB-C... a coincidence?)
>>
>> What does it mean?
>> Do I need to be worried?
>>
>> I am using a debian testing on a 32 bit box.
>> The previous kernel was linux-image-3.12-1-486.
>> It did not show those messages, but maybe due to some configure
>> options... I built this one from linux-source-3.14...
>>
> Answering my own question:
> Other posts suggests that it is not actually an error on cards without a
> CI interface. Here's a patch that turns it into a debug message, so it
> does not clobber the logs.
> 
> Signed-off-by: Johann Klammer <klammerj@...net>
> --- linux-source-3.14/drivers/media/common/saa7146/saa7146_core.c.orig  2014-07-31 23:51:43.000000000 +0200
> +++ linux-source-3.14/drivers/media/common/saa7146/saa7146_core.c 2014-10-06 18:57:54.000000000 +0200
> @@ -71,7 +71,7 @@ static inline int saa7146_wait_for_debi_
>     if (saa7146_read(dev, MC2) & 2)
>       break;
>     if (err) {
> -     pr_err("%s: %s timed out while waiting for registers getting programmed\n",
> +     pr_debug("%s: %s timed out while waiting for registers getting programmed\n",
>              dev->name, __func__);
>       return -ETIMEDOUT;
>     }
> 
> 
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