Re: PCI device driver broken between 4.2 and 4.3

[ÐÐÐÐ ÐÐÑÐÐ]

I confirmed it works in

890e4847587f

and do not works in

991de2e59090

26.01.2016 18:32, Bjorn Helgaas ÐÐÑÐÑ:
> [+cc Jiang]
>
> On Mon, Jan 25, 2016 at 03:52:51PM -0600, Bjorn Helgaas wrote:
> > Hi ÐÐÐÐ,
> >
> > On Sun, Jan 24, 2016 at 04:50:08PM +0300, ÐÐÐÐ ÐÐÑÐÐ 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, ÐÐÐÐ bisected this to 991de2e59090 ("PCI, x86: Implement
> pcibios_alloc_irq() and pcibios_free_irq()").
>
> ÐÐÐÐ, 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 ÐÐÑÐÑ:
> > > > [+cc linux-kernel]
> > > >
> > > > Hi ÐÐÐÐ,
> > > >
> > > > On Sat, Jan 23, 2016 at 1:08 AM, ÐÐÐÐ ÐÐÑÐÐ <oleg.moroz@xxxxxxxxxxxxx> 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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