netdev - Re: [PATCH 1/5] ARM: OMAP2+: gpmc: Fix kernel BUG for DT boot mode

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Message-ID: <20121017161348.GT15569@atomide.com>
Date:	Wed, 17 Oct 2012 09:13:48 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Jon Hunter <jon-hunter@...com>
Cc:	Richard Cochran <richardcochran@...il.com>,
	Afzal Mohammed <afzal@...com>,
	Russell King <linux@....linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>, netdev@...r.kernel.org,
	"hvaibhav@...com" <hvaibhav@...com>,
	David Miller <davem@...emloft.net>,
	linux-arm-kernel@...ts.infradead.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>
Subject: Re: [PATCH 1/5] ARM: OMAP2+: gpmc: Fix kernel BUG for DT boot mode

* Jon Hunter <jon-hunter@...com> [121017 07:43]:
> 
> On 10/16/2012 04:26 PM, Tony Lindgren wrote:
> > * Jon Hunter <jon-hunter@...com> [121016 14:00]:
> >> Hi Tony,
> >>
> >> On 10/16/2012 12:48 PM, Tony Lindgren wrote:
> >>> * Richard Cochran <richardcochran@...il.com> [121015 12:18]:
> >>>> From: hvaibhav@...com <hvaibhav@...com>
> >>>>
> >>>> With recent changes in omap gpmc driver code, in case of DT
> >>>> boot mode, where bootloader does not configure gpmc cs space
> >>>> will result into kernel BUG() inside gpmc_mem_init() function,
> >>>> as gpmc cs0 gpmc_config7[0].csvalid bit is set to '1' and
> >>>> gpmc_config7[0].baseaddress is set to '0' on reset.
> >>>>
> >>>> This use-case is applicable for any board/EVM which doesn't have
> >>>> any peripheral connected to gpmc cs0, for example BeagleXM and
> >>>> BeagleBone, so DT boot mode fails.
> >>>>
> >>>> This patch adds of_have_populated_dt() check before creating
> >>>> device, so that for DT boot mode, gpmc probe will not be called
> >>>> which is expected behavior, as gpmc is not supported yet from DT.
> >>>
> >>> I'm applying this one into omap-for-v3.7-rc1/fixes-part2.
> >>>
> >>> Next time, please also cc linux-omap@...r.kernel.org for series
> >>> like this. I'm sure the people reading the omap list are interested
> >>> in these.
> >>
> >> This patch appears to be masking an underlying issue. How about 
> >> something like the following ...
> > 
> > OK that looks good to me. I'll drop the earlier fix and use
> > yours instead.
> 
> Hi Tony, sorry but I realised now that in my patch that I need to
> take care of releasing and memory and clocks that were acquired 
> during the probe. Here is a V2. If you prefer I can create a delta
> patch also with the previous. 

OK thanks I'll update it.

Regards,

Tony
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