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

From Måns Rullgård <mans@mansr.com>
Newsgroups linux.kernel
Subject Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel
Date 2015-12-18 23:40 +0100
Message-ID <qHbQR-3fx-1@gated-at.bofh.it> (permalink)
References (16 earlier) <qH2ky-5zs-17@gated-at.bofh.it> <qH2DW-5IP-63@gated-at.bofh.it> <qH6Rb-5l-9@gated-at.bofh.it> <qH6Rb-5l-7@gated-at.bofh.it> <qHbQR-3fx-3@gated-at.bofh.it>
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Julian Margetson <runaway@candw.ms> writes:

> On 12/18/2015 1:18 PM, Måns Rullgård wrote:
>> Julian Margetson <runaway@candw.ms> writes:
>>
>>> On 12/18/2015 8:49 AM, Måns Rullgård wrote:
>>>> Andy Shevchenko <andriy.shevchenko@linux.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.
>>>>
>>> Changed the sata-dwc to a module .
>>>
>>> [   18.475140] sata-dwc 4bffd1000.sata: sata_dwc_qc_prep_by_tag: dma_dwc_xfer_setup returns NULL
>>> [   18.535698] sata-dwc 4bffd1000.sata: sata_dwc_qc_prep_by_tag: dma_dwc_xfer_setup returns NULL
>> That's strange.  The only way that can happen is if
>> dmaengine_prep_slave_sg() return NULL, and that really shouldn't be
>> happening.  Did you turn on debug messages in dw_dma?  You can enable
>> some extra debug messages by adding "#define VERBOSE_DEBUG" at the top
>> of drivers/dma/dw/core.c
>>
>
> [   17.526173] sata-dwc 4bffd1000.sata: sata_dwc_qc_prep_by_tag: dma_dwc_xfer_setup returns NULL
> [   17.600124] sata-dwc 4bffd1000.sata: sata_dwc_qc_prep_by_tag: dma_dwc_xfer_setup returns NULL
> [   17.662978] sata-dwc 4bffd1000.sata: sata_dwc_qc_prep_by_tag: dma_dwc_xfer_setup returns NULL

Could you post the entire kernel log?  There might be important
information before the errors start.

-- 
Måns Rullgård
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[PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Mans Rullgard <mans@mansr.com> - 2015-12-16 00:30 +0100
  [PATCH 3/3] ata: sata_dwc_460ex: get rid of global data Mans Rullgard <mans@mansr.com> - 2015-12-16 00:30 +0100
    Re: [PATCH 3/3] ata: sata_dwc_460ex: get rid of global data Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 16:10 +0100
      Re: [PATCH 3/3] ata: sata_dwc_460ex: get rid of global data Måns Rullgård <mans@mansr.com> - 2015-12-17 16:20 +0100
        Re: [PATCH 3/3] ata: sata_dwc_460ex: get rid of global data Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 16:40 +0100
          Re: [PATCH 3/3] ata: sata_dwc_460ex: get rid of global data Måns Rullgård <mans@mansr.com> - 2015-12-17 17:00 +0100
  [PATCH 2/3] ata: sata_dwc_460ex: add phy support Mans Rullgard <mans@mansr.com> - 2015-12-16 00:30 +0100
    Re: [PATCH 2/3] ata: sata_dwc_460ex: add phy support Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> - 2015-12-16 12:20 +0100
      Re: [PATCH 2/3] ata: sata_dwc_460ex: add phy support Måns Rullgård <mans@mansr.com> - 2015-12-16 12:30 +0100
  Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-16 00:40 +0100
    Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 16:10 +0100
      Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-17 16:20 +0100
        Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 17:00 +0100
          Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-17 17:10 +0100
            Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 18:00 +0100
              Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-17 19:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-17 20:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-18 02:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 02:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-18 11:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 12:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-18 12:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 13:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-18 13:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 13:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 18:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-18 19:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 23:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 00:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-19 03:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 16:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 17:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-19 18:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 18:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-19 18:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-19 18:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 18:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 20:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-19 21:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-19 21:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-19 21:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-20 18:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-20 18:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-20 19:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-20 19:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-20 21:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-20 22:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 02:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 20:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 20:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 22:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 22:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-22 01:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-22 12:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 18:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 18:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-21 19:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 19:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 19:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 20:10 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 20:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 20:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 20:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 21:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 21:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 21:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 19:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 01:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 02:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 02:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-21 09:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 13:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-12-21 18:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 19:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 20:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 21:00 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 13:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-21 14:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 16:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-21 17:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-21 19:20 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-18 13:40 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 13:50 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-18 15:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel Måns Rullgård <mans@mansr.com> - 2015-12-18 15:30 +0100
                Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-18 13:50 +0100
              Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Julian Margetson <runaway@candw.ms> - 2015-12-17 19:10 +0100
  Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find  dma channel Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2015-12-17 16:00 +0100

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