Frank Rowand wrote: > 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. > > > >> Note that to compile this version of the kernel, an additional fix must > >> also be applied: > >> > >> commit ba5952e0711b14d8d4fe172671f8aa6091ace3ee > >> Author: Ming Lei <ming.lei@xxxxxxxxxxxxx> > >> Date: Fri Jul 13 17:25:24 2012 +0800 > >> > >> USB: ehci-omap: fix compile failure(v1) > >> > >> The symptom can be worked around by retrying the USB access if a timeout > >> occurs. This is clearly _not_ the fix, just a hack that I used to > >> investigate the problem: > >> > >> http://article.gmane.org/gmane.linux.rt.user/9773 > >> > >> My kernel configuration is: > >> > >> arch/arm/configs/omap2plus_defconfig > >> > >> plus to get the ethernet driver I add: > >> > >> CONFIG_USB_EHCI_HCD > >> CONFIG_USB_NET_SMSC95XX > >> > >> I found the problem on 3.6.11, but have not replicated it on 3.9-rcX > >> yet because my config fails to build on 3.9-rc1 and 3.9-rc2. I'll try > >> to work on that issue tomorrow. > > > > Let me know how it works out. > > My PandaBoard builds fail on 3.9-rcX due to ARM multiplatform issues. > Either there is something I need to change about the way I build it, > or it is broken (that is a side issue). My simple expedient was to > hack around multiplatform, and just make it build (patch below if > anyone else wants a _temporary_ hack). I have built 3.9-RC2 for PandaBoard ES and the only problem I have seen is that you need to add "LOADADDR=0x80008000" when building uImage target. -- Mats -- 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
