linux-kernel - Re: [regression, bisected] 4.11+ imx uarts broken

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <a1fa7693-c9e9-fea8-fbb7-a20ebf1dd287@nextfour.com>
Date:   Tue, 9 May 2017 10:25:40 +0300
From:   Mika Penttilä <mika.penttila@...tfour.com>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
CC:     <linux-serial@...r.kernel.org>, <kernel@...gutronix.de>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [regression, bisected] 4.11+ imx uarts broken

On 05/09/2017 10:14 AM, Uwe Kleine-König wrote:
> Hello Mika,
> 
> On Tue, May 09, 2017 at 07:18:09AM +0300, Mika Penttilä wrote:
>> The following commit e61c38d85b7 makes the uarts on i.MX6 nonfunctional (no data transmitted or received). 
>> With e61c38d85b7 reverted the uarts work ok.
>>
>> -------------------
>> commit e61c38d85b7392e033ee03bca46f1d6006156175
>> Author: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
>> Date:   Tue Apr 4 11:18:51 2017 +0200
>>
>>     serial: imx: setup DCEDTE early and ensure DCD and RI irqs to be off
>>  
>> --------------------
> 
> are you operating the UART in DTE or DCE mode? Does this affect all
> UARTs or only those that are not used in the bootloader?

I am operating in DCE mode. The debug/console uart works ok, but two others don't.

> 
> Looking at the patch I wonder if setting IMX21_UCR3_RXDMUXSEL |
> UCR3_ADNIMP is missing for you.
> 

Probably yes, but I can verify this later and get back to you.

> Can you please check which hunk of e61c38d85b73 is giving you problems?
> 
> Best regards
> Uwe
> 

--Mika