Re: [PATCH 03/23] printk: Move braille console support into separatebraille.[ch] files

From: Stephen Warren
Date: Thu Oct 25 2012 - 11:32:00 EST


On 10/24/2012 06:31 PM, Joe Perches wrote:
> On Wed, 2012-10-24 at 18:12 -0600, Stephen Warren wrote:
>> On 10/17/2012 12:06 AM, Joe Perches wrote:
>>> Create files with prototypes and static inlines for braille
>>> support. Make braille_console functions return 1 on success.
>>
>> Joe,
>>
>> Between next-20121022 and next-20121023, the serial console (on the ARM
>> SoC Tegra at least) stopped working. The issue bisects down to this
>> commit. I haven't had a chance to investigate why yet, I just finished
>> bisected.
>>
>> earlyprintk over the same UART works. Once the system has booted, a few
>> late kernel messages do appear, and then getty/login over the UART
>> works. So, it's just the printk messages that disappeared.
>>
>> In case it's relevant, my command-line is:
>>
>> console=ttyS0,115200n8 loglevel=8 rootwait rw earlyprintk
>> root=PARTUUID=b2f82cda-2535-4779-b467-094a210fbae7
>>
>> I'll continue to investigate further tomorrow, but just wanted to give
>> you a heads-up in case you could immediately see anything obvious in the
>> code.
>
> Hi Stephen.
>
> Thanks, I appreciate the heads-up. This should be solved
> by Ming Lei's patch (which I've incorporated into a V2
> series I will post shortly).
>
> https://lkml.org/lkml/2012/10/23/307

Thanks. I can confirmed that patch does fix my issue.
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