Re: Fwd: Tegra 30 System hangs because of commit "pinctrl: move subsystem mutex to pinctrl_dev struct"

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]

On 13:59 Mon 29 Apr     , Stephen Warren wrote:
> On 04/29/13 12:41, Bryan Wu wrote:
> >Forward to ARM and Tegra mail list.
> >
> >---------- Forwarded message ----------
> >From: Bryan Wu <cooloney@gmail.com>
> >Date: Mon, Apr 29, 2013 at 11:15 AM
> >Subject: Tegra 30 System hangs because of commit "pinctrl: move
> >subsystem mutex to pinctrl_dev struct"
> >To: patrice.chotard@st.com, Linus Walleij <linus.walleij@linaro.org>
> >Cc: Stephen Warren <swarren@wwwdotorg.org>,
> >"linux-next@vger.kernel.org" <linux-next@vger.kernel.org>
> >
> >
> >Hi Patrice and Linus,
> >
> >I'm running linux-next on my Tegra 30 system everyday. But since
> >next-20130426 release, the linux-next kernel will hang on my Tegra 30
> >boards like Cardhu and Beaver.
> >
> >After some bisect and comparing to next-20130424, I found the commit
> >"pinctrl: move subsystem mutex to pinctrl_dev struct" introduced this
> >issue. If I simply revert this patch in next-20130429, system boots up
> >as before.
> >
> >Could you please help to check this?
> 
> I would suggest simply dropping or reverting this patch; I had
> pointed out a long time ago that it was unlikely to be correct.
> 
> My guess/suspicion is a recursive lock attempt during processing
> hogs during pinctrl device registration, or perhaps during dt->map
> conversion. Bryan, are you able to confirm this?

same issue on at91sam9g45ek

revert it

Best Regards,
J.
> 
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