linux-kernel - Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

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Message-ID: <yw1x37uzc45t.fsf@unicorn.mansr.com>
Date:	Fri, 18 Dec 2015 12:49:50 +0000
From:	Måns Rullgård <mans@...sr.com>
To:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:	Julian Margetson <runaway@...dw.ms>, Tejun Heo <tj@...nel.org>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel

Andy Shevchenko <andriy.shevchenko@...ux.intel.com> writes:

>> > [    5.206125] Unable to handle kernel paging request for data at
>> > address 0x00000000
>> > [    5.228546] Faulting instruction address: 0xc043a2c8
>> > [    5.248577] Vector: 300 (Data Access) at [eddafae0]
>> > [    5.268658]     pc: c043a2c8: sata_dwc_qc_issue+0xb8/0x204
>> 
>> Well, that's not good.  Can you translate that address to a line of
>> code?
>
> Besides that, can you enable DYNAMIC_DEBUG in the config and append
> 'dw_dmac_core.dyndbg dw_dmac.dyndbg' to the kernel cmdline?

Enabling debug messages in the sata_dwc driver might also be informative.

-- 
Måns Rullgård
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