linux-kernel - Re: [PATCH AVAIL.]ivtv:Crash 2.6.26 with KUROTOSIKOU CX23416-STVLP

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Message-Id: <1218354059.5457.9.camel@melchior.hokkemirin.ddo.jp>
Date:	Sun, 10 Aug 2008 16:40:59 +0900
From:	Kyuma Ohta <whatisthis.sowhat@...il.com>
To:	JeanDelvare <khali@...ux-fr.org>, HansVerkuil <hverkuil@...all.nl>,
	Video4Linux ML <video4linux-list@...hat.com>,
	ivtv-devel ML <ivtv-devel@...vdriver.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>
Cc:	whatisthis.sowhat@...il.com
Subject: Re: [PATCH AVAIL.]ivtv:Crash 2.6.26 with KUROTOSIKOU CX23416-STVLP

Dear Hans,and Jean;
 I was applied Hans's patch to 2.6.26.1 vanilla at
morning of 08/06 (JST),and running to now,problem
cause from IIC issue was not happend.
 Thanx for you (^^)

Ohta
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2008-08-07 (Thu) の 15:07 +0200, Jean Delvare wrote:
> Hi Hans,
> 
> On Sun, 3 Aug 2008 23:12:25 +0200, Hans Verkuil wrote:
> > Hi Ohta,
> > 
> > Well, I picked up my card this weekend and tested it. It turns out to be 
> > an i2c-core.c bug: chips with i2c addresses in the 0x5x range are 
> > probed differently than other chips and the probe command contains an 
> > error. The upd64083 has an address in that range and so was hit by this 
> > bug. The attached patch for linux/drivers/i2c/i2c-core.c will fix it.
> > 
> > As you can see, this mail also goes to Jean Delvare so that he can move 
> > this upstream (should also go to the 2.6.26-stable series, Jean!).
> > 
> > For the ivtv driver this bug will only hit cards where ivtv has to probe 
> > for an upd64083.
> > 
> > SoB for this patch:
> > 
> > Signed-off-by: Hans Verkuil <hverkuil@...all.nl>
> > 
> > I've verified that this is only an issue with kernels 2.6.26 and up. 
> > Older kernels are not affected unless the ivtv driver from the v4l-dvb 
> > repository is used. To be more precise: this bug has been in i2c-core.c 
> > since 2.6.22, but the ivtv driver in 2.6.26 was the first driver that 
> > used i2c_new_probed_device() with an i2c address in a range that caused 
> > the broken probe to be used.
> 
> Good catch, thanks for the patch. I'll push it to Linus by the end of
> the week.
> 

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