Hi, yes the hang is after "bridge, pass 1 pci_bus 0000:01: scanning bus"; I haven't a pcie analyzer. IVan 2016-07-20 10:51 GMT+02:00 Richard Zhu <hongxing.zhu@xxxxxxx>: > Hi Ivan: > Sorry to reply late. > >> -----Original Message----- >> From: Ivan Grimaldi [mailto:grimaldi.ivan@xxxxxxxxx] >> Sent: Monday, July 18, 2016 6:45 PM >> To: Richard Zhu <hongxing.zhu@xxxxxxx> >> Cc: r65037@xxxxxxxxxxxxx; l.stach@xxxxxxxxxxxxxx; linux-pci@xxxxxxxxxxxxxxx; >> bhelgaas@xxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx >> Subject: Re: PROBLEM: pcie imx6 link problem after a random number of >> reboot >> >> Hi, >> >> i have enabled early printk and after a random number of restart the kernel >> hangs occurs later in the log (Below kernel log). >> >> ... >> imx6q-pcie 1ffc000.pcie: Link up, Gen=2 >> imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00 pci_bus 0000:00: root >> bus resource [io 0x1000-0xffff] pci_bus 0000:00: root bus resource [mem >> 0x01000000-0x01efffff] pci_bus 0000:00: root bus resource [bus 00-ff] pci_bus >> 0000:00: scanning bus pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400 pci >> 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff] pci 0000:00:00.0: reg >> 0x38: [mem 0x00000000-0x0000ffff pref] pci 0000:00:00.0: calling >> pci_fixup_ide_bases+0x0/0x4c pci 0000:00:00.0: supports D1 pci 0000:00:00.0: >> PME# supported from D0 D1 D3hot D3cold pci 0000:00:00.0: PME# disabled >> pci_bus 0000:00: fixups for bus >> PCI: bus0: Fast back to back transfers disabled pci 0000:00:00.0: scanning [bus >> 01-01] behind bridge, pass 0 pci 0000:00:00.0: scanning [bus 00-00] behind >> bridge, pass 1 pci_bus 0000:01: scanning bus >> >> > [Zhu hongxing] The pcie link is up refer to the log. > Is it hang here? > > If yes, I suspect that the link is not stable, and the link is down here. > Can you use one pcie protocol analyzer to figure out what happen on the bus? > >> >> IVan >> >> > <snip...> > > Best Regards > hongxing zhu > Linux BSP team > Office: 86-21-28937189 > Email: hongxing.zhu@xxxxxxx > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
