On 03/21/13 07:41, Alan Stern wrote: > On Wed, 20 Mar 2013, Frank Rowand wrote: > >> Hi All, >> >> Not quite sure quite where the problem is (USB, OMAP, smsc95xx driver, other???), >> so casting the nets wide... >> >> The PandaBoard frequently fails to boot with an eth0 error when mounting >> the root file system via NFS (ethernet driver fails due to a USB timeout; >> no ethernet means NFS won't work). A typical set of error messages is: >> >> [ 3.264373] smsc95xx 1-1.1:1.0: usb_probe_interface >> [ 3.269500] smsc95xx 1-1.1:1.0: usb_probe_interface - got id >> [ 3.275543] smsc95xx v1.0.4 >> [ 8.078674] smsc95xx 1-1.1:1.0: eth0: register 'smsc95xx' at usb-ehci-omap.0-1.1, smsc95xx USB 2.0 Ethernet, 82:b9:1d:fa:67:0d >> [ 8.091003] hub 1-1:1.0: state 7 ports 5 chg 0000 evt 0002 >> [ 13.509918] usb 1-1.1: swapper/0 timed out on ep0out len=0/4 >> [ 13.515869] smsc95xx 1-1.1:1.0: eth0: Failed to write register index 0x00000108 >> [ 13.523559] smsc95xx 1-1.1:1.0: eth0: Failed to write ADDRL: -110 >> [ 13.529998] IP-Config: Failed to open eth0 >> >> I have bisected this to: >> >> commit 18aafe64d75d0e27dae206cacf4171e4e485d285 >> Author: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> >> Date: Wed Jul 11 11:23:04 2012 -0400 >> >> USB: EHCI: use hrtimer for the I/O watchdog > > I don't understand how that commit could cause a timeout unless there > are at least two other bugs present in your system. Yes, I would not be at all surprised if this commit merely exposes a problem in other code. That is why I included so many different people and subsystems on the email distribution list. < snip > -Frank -- 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
