linux-kernel - Fwd: Re: eata fails to load on post 4.2 kernels

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Date:	Mon, 07 Sep 2015 18:54:46 +0930
From:	Arthur Marsh <arthur.marsh@...ernode.on.net>
To:	linux-scsi@...r.kernel.org
CC:	linux-kernel@...r.kernel.org
Subject: Fwd: Re: eata fails to load on post 4.2 kernels

Forwarding without image attachment to get below message size limit of 
the mailing lists.

I've uploaded the image to:
http://www.users.on.net/~arthur.marsh/20150907539.jpg


-------- Forwarded Message --------
Subject: Re: eata fails to load on post 4.2 kernels
Date: Mon, 07 Sep 2015 15:56:02 +0930
From: Arthur Marsh <arthur.marsh@...ernode.on.net>
To: Jiang Liu <jiang.liu@...ux.intel.com>
CC: Bjorn Helgaas <bhelgaas@...gle.com>, tglx@...utronix.de, 
linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org



Jiang Liu wrote on 07/09/15 12:36:
> On 2015/9/7 4:31, Arthur Marsh wrote:
>> Arthur Marsh wrote on 06/09/15 21:07:
>>> Arthur Marsh wrote on 06/09/15 18:34:
>>>> Arthur Marsh wrote on 06/09/15 15:58:
>>>>> Hi, I'm seeing the following on post 4.2 kernels, am currently
>>>>> bisecting
>>>>> to find where it started:
>>>
>>> First kernel in the bisection that worked without needing irqpoll:
>>>
>>> [   73.751482] EATA0: IRQ 10 mapped to IO-APIC IRQ 17.
>>> [   73.776711] EATA/DMA 2.0x: Copyright (C) 1994-2003 Dario Ballabio.
>>> [   73.802005] EATA config options -> tm:1, lc:y, mq:16, rs:y, et:n,
>>> ip:n, ep:n, pp:y.
>>> [   73.829175] EATA0: 2.0C, PCI 0xd890, IRQ 17, BMST, SG 122, MB 64.
>>> [   73.855552] EATA0: wide SCSI support enabled, max_id 16, max_lun 8.
>>> [   73.881125] EATA0: SCSI channel 0 enabled, host target ID 7.
>>
>> After a git bisect, I get:
>>
>> git bisect good
>> 991de2e59090e55c65a7f59a049142e3c480f7bd is the first bad commit
>> commit 991de2e59090e55c65a7f59a049142e3c480f7bd
>> Author: Jiang Liu <jiang.liu@...ux.intel.com>
>> Date:   Wed Jun 10 16:54:59 2015 +0800
>>
>>      PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()
>>
>>      To support IOAPIC hotplug, we need to allocate PCI IRQ resources on
>> demand
>>      and free them when not used anymore.
>>
>>      Implement pcibios_alloc_irq() and pcibios_free_irq() to dynamically
>>      allocate and free PCI IRQs.
>>
>>      Remove mp_should_keep_irq(), which is no longer used.
>>
>>      [bhelgaas: changelog]
>>      Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
>>      Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
>>      Acked-by: Thomas Gleixner <tglx@...utronix.de>
>>
>> :040000 040000 765e2d5232d53247ec260b34b51589c3bccb36ae
>> f680234a27685e94b1a35ae2a7218f8eafa9071a M      arch
>> :040000 040000 d55a682bcde72682e883365e88ad1df6186fd54d
>> f82c470a04a6845fcf5e0aa934512c75628f798d M      drivers
>>
>> I'm happy to supply more details if needed.
> Hi Arthur,
> 	Thanks for reporting this. It seems to be an irq misrouting
> issue. Could you please help to provide:
> 1) full dmesg with the latest code
> 2) full dmesg and /proc/interrupts with the latest code and
>     kernel parameter "irqpoll" specified
> Thanks!
> Gerry

The pc locks up when loading the eata module so I've attached a photo of
the monitor screen.

Arthur.






View attachment "2015090715dmesg-ordinary.txt" of type "text/plain" (51695 bytes)

View attachment "2015090715irqpoll.txt" of type "text/plain" (52866 bytes)

View attachment "2015090715proc-interrupts.txt" of type "text/plain" (1514 bytes)