linux-kernel - Re: Regression in kernel 3.8-rc1 bisected to commit adfa79d: I now get many "unable to enumerate USB device" messages

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Message-ID: <50DB4C27.8040007@lwfinger.net>
Date:	Wed, 26 Dec 2012 13:12:39 -0600
From:	Larry Finger <Larry.Finger@...inger.net>
To:	Alan Stern <stern@...land.harvard.edu>
CC:	LKML <linux-kernel@...r.kernel.org>, linux-usb@...r.kernel.org
Subject: Re: Regression in kernel 3.8-rc1 bisected to commit adfa79d: I now
 get many "unable to enumerate USB device" messages

On 12/26/2012 10:45 AM, Alan Stern wrote:
>
> I see.  Do you happen to have CONFIG_USB_EHCI_HCD=y and
> CONFIG_USB_EHCI_PCI=m in your .config?  If you do, try changing
> EHCI_PCI to y.

One additional data point: When the EHCI and HCD parameters are set to y rather 
than m as in the list that follows, the enumerate messages do not occur.

CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB_XHCI_HCD=y
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_OHCI_HCD=y
CONFIG_USB_EHCI_PCI=y
# CONFIG_USB_OHCI_HCD_PLATFORM is not set
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
CONFIG_USB_UHCI_HCD=y

Larry

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