On Wed, Apr 11, 2012 at 1:38 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 11 Apr 2012, Calin Demian wrote: > >> Hi! >> Yes, in fact I did allready follow the execution, and it looks like this: >> function file >> pci_apply_final_quirks /drivers/pci/quirks.c >> pci_fixup_device ~ >> pci_do_fixups ~ >> here, for the ohci busses 2 functions are called: >> nv_msi_ht_cap_quirk_all /drivers/usb/host/pci-quirks.c > > What is that? It's not present in my copy of the kernel source. > >> quirk_usb_early_handoff ~ >> quirk_usb_early_handoff calls the following 3 functions: >> pci_enable_device(pdev) /drivers/pci/pci.c >> quirk_usb_handoff_ohci(pdev) /drivers/usb/host/pci-quirks.c >> pci_disable_device(pdev) >> >> The execution stops inside pci_disable_device, but because >> quirk_usb_handoff_ohci is the only function that has changed between >> versions 3.0.13 and 3.0.20 from the list of files mentioned above, it >> seems that this function changed behaviour in a way that my computer >> doesn't like. > > That cannot be right. The call to pci_disable_device was added after > the change to quirk_usb_handoff_ohci. > >> Further trace: >> pci_disable_device >> do_pci_disable_device >> pci_read_config_word > > I have no idea why your computer would crash inside or after > pci_read_config_word. > > Anyway, this is a PCI problem, not a USB problem. Maybe the PCI > experts can help. I have CC'ed the linux-pci mailing list. > > Alan Stern > >> with respect, >> Calin Demian >> >> >> 2012/4/11 Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>: >> > On Wed, 11 Apr 2012, Calin Demian wrote: >> > >> >> 1.Boot problem: computer stops responding during boot. >> >> >> >> 2.The symptom doesn't occur allways, but when it does, it is at the >> >> same point during the boot process. The last messages displayed differ >> >> between different kernel versions, but are the same each time. >> >> I would appreciate if you could take a look at function >> >> "quirk_usb_handoff_ohci" in file /drivers/usb/host/pci-quirks.c - >> >> which was modified in version 3.0.17 of the mainline kernel. The >> >> problem appeared when upgrading Ubuntu from mainline kernel version >> >> 3.0.13 to version 3.0.20. Searching the changelogs I found that this >> >> function was modified between the two releases. The computer freezes >> >> durin applying the quirks (pci_apply_final_quirks) for bus >> >> 0000:00:13.1 (the 2nd OHCI bus). Controller is ALI (EHCI 8 ports + >> >> OHCI 3x3 ports), dev_id 5237(OHCI). It sounds like this is a regression between 3.0.13 and 3.0.20. Can you please open a bug report here: https://bugzilla.kernel.org/enter_bug.cgi?product=Drivers&component=PCI and attach dmesg or serial console logs with "debug ignore_loglevel initcall_debug" for both kernels? For 3.0.20 you probably can't get a dmesg log because of the hang, so a digital photo would be fine, too. Thanks, Bjorn -- 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
