Bug#622649: linux-image-2.6.38-2-amd64: unable to enumerate USB device on port 6
On Fri, 15 Apr 2011, Ben Hutchings wrote:
> On Wed, 2011-04-13 at 18:32 +0200, Hans-J. Ullrich wrote:
> [...]
> > I get massive messages from the kernel "unable to enumerate USB device
> > on port 6" which is making the pc slower and
> > which is filling up my syslog. The problem is caused by the ohci-hcd
> > kernel module. Unloading it, is stopping
> > the messages, but then the mouse will not work (of course).
> >
> > This bug appeared the first time at the change from
> > linux-image-2.6.32-5-amd64-30 --> linux-image-2.6.32-5-amd64-31 (and
> > higher!)
> > and it appeared only on 64-bit-systems.
> [...]
>
> The only change to ohci-hcd between these versions was:
>
> commit 5f528de0ef9b3e092e276d95930830b847b33dc4
> Author: Alan Stern <stern@rowland.harvard.edu>
> Date: Fri Sep 10 16:37:05 2010 -0400
>
> OHCI: work around for nVidia shutdown problem
>
> commit 3df7169e73fc1d71a39cffeacc969f6840cdf52b upstream.
>
> The reporter's system does indeed have an nVidia MCP67 chipset. Full
> details (kernel log, lspci, etc.) are at <http://bugs.debian.org/620848>
> and <http://bugs.debian.org/622649>.
Hans, can you test whether the patch below fixes your problem?
Alan Stern
Index: usb-2.6/drivers/usb/host/ohci-pci.c
===================================================================
--- usb-2.6.orig/drivers/usb/host/ohci-pci.c
+++ usb-2.6/drivers/usb/host/ohci-pci.c
@@ -207,10 +207,18 @@ static int ohci_quirk_amd700(struct usb_
*/
static int ohci_quirk_nvidia_shutdown(struct usb_hcd *hcd)
{
+ struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
struct ohci_hcd *ohci = hcd_to_ohci(hcd);
- ohci->flags |= OHCI_QUIRK_SHUTDOWN;
- ohci_dbg(ohci, "enabled nVidia shutdown quirk\n");
+ /* Evidently nVidia fixed their later hardware; this is a guess at
+ * the changeover point.
+ */
+#define PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_USB 0x026d
+
+ if (pdev->device < PCI_DEVICE_ID_NVIDIA_NFORCE_MCP51_USB) {
+ ohci->flags |= OHCI_QUIRK_SHUTDOWN;
+ ohci_dbg(ohci, "enabled nVidia shutdown quirk\n");
+ }
return 0;
}
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