Le mardi, 15 juin 2010 12.43:42, Daniel Mack a écrit : > On Tue, Jun 15, 2010 at 12:34:23PM +0200, Wolfram Sang wrote: > > The old code registered the hcd even if there were no transceivers > > detected, leading to oopses like this if we try to probe a non-existant > > ULPI: > > Hmm. I'm aware that there was a missing bail in this function, but > actually, I had hardware which didn't properly detect the ULPI chip but > still worked fine. There has been quite some discussion here about that, > and eventually I decided to not make this a hard error as it didn't > really harm. > > > [ 2.730000] mxc-ehci mxc-ehci.0: unable to init transceiver > > [ 2.740000] timeout polling for ULPI device > > [ 2.740000] timeout polling for ULPI device > > [ 2.750000] mxc-ehci mxc-ehci.0: unable to enable vbus on transceiver > > [ 2.750000] mxc-ehci mxc-ehci.0: Freescale On-Chip EHCI Host > > Controller [ 2.760000] mxc-ehci mxc-ehci.0: new USB bus registered, > > assigned bus number 2 [ 2.770000] Unhandled fault: external abort on > > non-linefetch (0x808) at 0xc4876184 [ 2.770000] Internal error: : 808 > > [#1] PREEMPT > > [ 2.770000] last sysfs file: > > [ 2.770000] Modules linked in: > > [ 2.770000] CPU: 0 Not tainted (2.6.33.5 #5) > > [ 2.770000] PC is at ehci_hub_control+0x4d4/0x8f8 > > [ 2.770000] LR is at ehci_mxc_setup+0xbc/0xdc > > [ 2.770000] pc : [<c0196dfc>] lr : [<c019bc8c>] psr: 00000093 > > [ 2.770000] sp : c3815e40 ip : 00000001 fp : 60000013 > > [ 2.770000] r10: c4876184 r9 : 00000000 r8 : c3814000 > > [ 2.770000] r7 : c391d2cc r6 : 00000001 r5 : 00000001 r4 : 00000000 > > [ 2.770000] r3 : 80000000 r2 : 00000007 r1 : 80000000 r0 : c4876184 > > [ 2.770000] Flags: nzcv IRQs off FIQs on Mode SVC_32 ISA ARM > > Segment kernel [ 2.770000] Control: 0005317f Table: a0004000 DAC: > > 00000017 [ 2.770000] Process swapper (pid: 1, stack limit = > > 0xc3814270) > > But that, of course, changes everthing. If you happen to see such > Ooopses, your patch should go in, and I will check the boards again and > see if they still fail to probe the ULPI. Eventually, we might need some > kind of quirks field in the platform data :( > Have you tried my imx31 EHCI controller init patch applied ? http://lists.infradead.org/pipermail/linux-arm-kernel/2010-May/014729.html Btw, it has still not be applied, anybody knows why ? Regards, Philippe -- 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
