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 ��.n��������+%������w��{.n�����{���"�)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
