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

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Julian Margetson <runaway@xxxxxxxx> writes:

>>> Builds now. Using my own .config.
>> What changed?
> I may have messed up the patch initially .

Probably.  Let's pretend it never happened.

>>> [    4.784199] sata-dwc 4bffd1000.sata: id 0, controller version 1.82
>>> [    4.791186] scsi host0: sata-dwc
>>> [    4.794830] ata1: SATA max UDMA/133 irq 36
>>> [    4.799463] sata_sil 0001:00:04.0: Applying R_ERR on DMA activate FIS errata fix
>>> [    4.807959] scsi host1: sata_sil
>>> [    4.811662] scsi host2: sata_sil
>>> [    4.815242] ata2: SATA max UDMA/100 mmio m512@0xd84280000 tf 0xd84280080 irq 21
>>> [    4.822990] ata3: SATA max UDMA/100 mmio m512@0xd84280000 tf 0xd842800c0 irq 21
>>>
>>> [    5.143502] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
>>> [    5.164367] ata2: SATA link up 1.5 Gbps (SStatus 113 SControl 310)
>>> [    5.185174] ppc-of-ohci 4bffd0000.usb: irq 32, io mem 0x4bffd0000
>>> [    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?
>>
> need some guidance on method .

Enable CONFIG_DEBUG_INFO, then use this command:

$ addr2line -e vmlinux 0xc043a2c8

Obviously substitute the actual crashing address if it changes.

-- 
Måns Rullgård
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