linux-kernel - Re: PCI device driver broken between 4.2 and 4.3

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Date:	Wed, 27 Jan 2016 12:38:06 +0300
From:	Мороз Олег <oleg.moroz@....vniiem.ru>
To:	Bjorn Helgaas <helgaas@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>
Subject: Re: PCI device driver broken between 4.2 and 4.3

Also, my drive has no

pcibios_enable_device()
pcibios_alloc_irq()

calls.



26.01.2016 22:05, Олег Мороз пишет:
> I confirmed it works in
>
> 890e4847587f
>
> and do not works in
>
> 991de2e59090
>
> 26.01.2016 18:32, Bjorn Helgaas пишет:
>> [+cc Jiang]
>>
>> On Mon, Jan 25, 2016 at 03:52:51PM -0600, Bjorn Helgaas wrote:
>>> Hi Олег,
>>>
>>> On Sun, Jan 24, 2016 at 04:50:08PM +0300, Олег Мороз wrote:
>>>> Okay. I've sent logs (dmesg and lspci) from both 4.2 and 4.3 to 
>>>> bugzilla
>>> I don't see anything wrong in either log.  Both v4.2 and v4.3
>>> enumerate the device the same way, and the driver seems to claim it
>>> the same way:
>>>
>>>    pci 0000:0d:00.0: [10b5:9030] type 00 class 0x078000
>>>    pci 0000:0d:00.0: reg 0x14: [io  0x2100-0x217f]
>>>    pci 0000:0d:00.0: reg 0x18: [io  0x2380-0x239f]
>>>    pci 0000:0d:00.0: PME# supported from D0 D3hot
>>>    pci 0000:0d:01.0: [10b5:9030] type 00 class 0x078000
>>>    pci 0000:0d:01.0: reg 0x14: [io  0x2180-0x21ff]
>>>    pci 0000:0d:01.0: reg 0x18: [io  0x23a0-0x23bf]
>>>    pci 0000:0d:01.0: PME# supported from D0 D3hot
>>>    pci 0000:0d:02.0: [10b5:9030] type 00 class 0x078000
>>>    pci 0000:0d:02.0: reg 0x14: [io  0x2200-0x227f]
>>>    pci 0000:0d:02.0: reg 0x18: [io  0x2280-0x22ff]
>>>    pci 0000:0d:02.0: reg 0x1c: [io  0x2300-0x237f]
>>>    pci 0000:0d:02.0: PME# supported from D0 D3hot
>>>
>>>    sja1000_plx_pci 0000:0d:02.0: Detected "Eclus CAN-200-PCI" card 
>>> at slot #2
>>>    sja1000_plx_pci 0000:0d:02.0: Channel #1 at 0x0000000000012280, 
>>> irq 22 registered as can0
>>>    sja1000_plx_pci 0000:0d:02.0: Channel #2 at 0x0000000000012300, 
>>> irq 22 registered as can1
>>>    sja1000_plx_pci 0000:0d:02.0 can0: setting BTR0=0x03 BTR1=0x37
>>>
>>> One option is always to bisect between v4.2 and v4.3 to see which
>>> commit made it stop working.  See https://git-scm.com/docs/git-bisect
>> Jiang, Олег bisected this to 991de2e59090 ("PCI, x86: Implement
>> pcibios_alloc_irq() and pcibios_free_irq()").
>>
>> Олег, please double-check and confirm that 890e4847587f works and
>> 991de2e59090 fails.
>>
>> Then please add some printks in the pcibios_enable_device() and
>> pcibios_alloc_irq() paths and in your driver to see exactly what changed
>> between 890e4847587f and 991de2e59090
>>
>> Bjorn
>>
>>>> 23.01.2016 17:54, Bjorn Helgaas пишет:
>>>>> [+cc linux-kernel]
>>>>>
>>>>> Hi Олег,
>>>>>
>>>>> On Sat, Jan 23, 2016 at 1:08 AM, Олег Мороз 
>>>>> <oleg.moroz@....vniiem.ru> wrote:
>>>>>> Hello. I've got a device driver for MIL-1553b card called 
>>>>>> TA1-PCI, which
>>>>>> could be found at
>>>>>> https://github.com/qmor/elcus-1553-driver-linux
>>>>>> Card is using PLX_PCI9030 PCI controller.
>>>>>> Today i've found that this driver compiles, installes, but is not 
>>>>>> working as
>>>>>> it should.
>>>>>> Looks like it not receives any interrupts from PCI. I've test it 
>>>>>> again with
>>>>>> kernel
>>>>>> 4.2 and it works okay. What changes was made in PCI subsystem 
>>>>>> from 4.2 to
>>>>>> 4.3
>>>>>> which could have impact this driver work.
>>>>> Thank you very much for this problem report.  There were many PCI
>>>>> changes between v4.2 and v4.3, and without more information, I can't
>>>>> guess what might be causing this problem.
>>>>>
>>>>> I opened a bug report at 
>>>>> https://bugzilla.kernel.org/show_bug.cgi?id=111211
>>>>>
>>>>> Please attach complete dmesg logs for both v4.2 and v4.3 to that bug
>>>>> report.  Also, please attach the complete "lspci -vv" output (as
>>>>> root).
>>>>>
>>>>> Thanks!
>>>>>
>>>>> Bjorn
>>>> -- 
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>