Hello. On 21-11-2010 3:34, Brian J. Tarricone wrote:
From: Brian Tarricone<brian@xxxxxxxxxxxxx>
Tested on MacBookAir3,1. Without this, we get EPROTO errors when fetching device config descriptors.
Signed-off-by: Brian Tarricone<brian@xxxxxxxxxxxxx> Reported-by: Benoit Gschwind<gschwind@xxxxxxxxxxx> Tested-by: Edgar Hucek<gimli@xxxxxxxxxxxxxx> Cc: Greg Kroah-Hartman<greg@xxxxxxxxx>
[...]
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index a1e8d27..aa79f98 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -148,6 +148,18 @@ static int ehci_pci_setup(struct usb_hcd *hcd) if (pdev->revision< 0xa4) ehci->no_selective_suspend = 1; break; + + /* MCP89 chips on the MacBookAir3,1 give EPROTO when + * fetching device descriptors unless LPM is disabled. + * There are also intermittent problems enumerating + * devices with PPCD enabled. + */ + case 0x0d9d: + ehci_info(ehci, "disable lpm/ppcd for nvidia mcp89"); + ehci->has_lpm = 0; + ehci->has_ppcd = 0; + ehci->command&= ~(CMD_PPCEE);
Parens not needed.
+ break; } break; case PCI_VENDOR_ID_VIA:
WBR, Sergei -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
