Re: PCI reset problem

[Johannes Thumshirn <johannes.thumshirn@men.de>]

On Fri, Aug 30, 2013 at 12:46:27PM -0700, Yinghai Lu wrote:
> On Fri, Aug 30, 2013 at 1:01 AM, Johannes Thumshirn
> <johannes.thumshirn@men.de> wrote:
> >
> > I'll test on mainline and then check pci-busn-alloc, but I have this strange
> > feeling that it could be an interaction with Freescale's DPAA Ethernet, which is
> > not yet merged into mainline.
>
> please try for-pci-busn-alloc at
>      git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
> for-pci-busn-alloc-3.11
>
> it is based on linus's tree + pci/next
>
> Yinghai

Hi Yinghai,

I've tested the board with your for-pci-busn-alloc-3.11 branch. Initial
enumeration is just as it was before. With the difference that a "sysfs-rescan"
now results in:

root@generic-powerpc:~# lspci
00:00.0 PCI bridge: Freescale Semiconductor Inc P4080 (rev 20)
root@generic-powerpc:~# echo 1 > /sys/bus/pci/rescan
pci_bus 0000:00: scanning bus
pcieport 0000:00:00.0: scanning [bus 01-01] behind bridge, pass 0
pcieport 0000:00:00.0: scanning [bus 00-00] behind bridge, pass 1
pcieport 0000:00:00.0: rescan scaned bridge as broken one again ?
pci_bus 0000:00: bus scan returning with max=00
root@generic-powerpc:~# lspci
00:00.0 PCI bridge: Freescale Semiconductor Inc P4080 (rev 20)

The good news for me is, I can work on your tree to try to resolve the issue.

Johannes