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List:       linux-serial
Subject:    RE: Mainpine IQ Express Rev3 problems beginning 2.6.36
From:       "Lee Howard" <lee.howard () mainpine ! com>
Date:       2010-12-17 13:25:19
Message-ID: 64E919E148714BFCB46D62A05E9EF13D () callisto
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> -----Original Message-----
> From: linux-serial-owner@vger.kernel.org 
> [mailto:linux-serial-owner@vger.kernel.org] On Behalf Of Lee Howard
> Sent: Tuesday, December 14, 2010 11:50 AM
> To: 'Greg KH'
> Cc: linux-serial@vger.kernel.org
> Subject: RE: Mainpine IQ Express Rev3 problems beginning 2.6.36
> 
> > -----Original Message-----
> > From: Greg KH [mailto:greg@kroah.com]
> > Sent: Sunday, December 12, 2010 8:52 AM
> 
> > As for build issues, try to make a minimal working config for your 
> > system, using 'make localmodconfig'.  That will speed up your build 
> > time immensely as well as reduce your chances of build and runtime 
> > problems with the intermediate kernels.
> 
> Thank-you, that did help immensely.
> 
> Here's the 'git bisect' result...
> 
> --------------
> 7a56aa45982bb87bfca98a2832b5ae782c03364a is the first bad 
> commit commit 7a56aa45982bb87bfca98a2832b5ae782c03364a
> Author: Yegor Yefremov <yegor_sub1@visionsystems.de>
> Date:   Wed Jun 16 16:29:55 2010 +0200
> 
>     serial: add UART_CAP_EFR and UART_CAP_SLEEP flags to 
> 16C950 UARTs definition
>     
>     Adding UART_CAP_EFR and UART_CAP_SLEEP flags will enable 
> sleep mode
>     and automatic CTS flow control for 16C950 UARTs. It will 
> also avoid
>     capabilities detection warning like this:
>     
>     "ttyS0: detected caps 00000700 should be 00000100"
>     
>     Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
>     Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
> 
> :040000 040000 1776ca8d5c653834363c0778b5b404ee52bd2d69
> b81cfe4f302a674935181bd248641873820517e5 M      drivers
> --------------
> 
> Indeed, if I remove the UART_CAP_EFR flag from later kernel 
> revisions there is no problem.

Greg,

What's to be done?

Thanks,

Lee.

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