Re: USB driver issue

Felipe Balbi
2008-07-30T13:11:05Z

On Wed, Jul 30, 2008 at 06:28:35PM +0530, ext Dasgupta, Romit wrote:
> What is the application you are using and could you turn the musb driver debug options? You can try it by
>
> echo "D 3" > /proc/driver/musb_hdrc (Check if MUSB_DEBUG is enabled).

it's D3, together :-)

>
> This should give more helpful messages.
>
>
>
> >-----Original Message-----
> >From: linux-omap-open-source-bounces@linux.omap.com [mailto:linux-omap-open-
> >source-bounces@linux.omap.com] On Behalf Of SUBHRANIL CHOUDHURY
> >Sent: Wednesday, July 30, 2008 5:50 PM
> >To: Gadiyar, Anand
> >Cc: linux-omap-open-source@linux.omap.com
> >Subject: Re: USB driver issue
> >
> >hi,
> >I am using Mistral OMAP3430 OSK2.1 board. It is the USB OTG port.
> >The Philips tranciever ISP1504.
> >I am enabling the EHCI and OHCI in the kernel menuconfig.
> >
> >This was the error print i was getting:
> >
> >Unable to handle kernel NULL pointer dereference at virtual address 00000000
> >pgd = c54d8000
> >[00000000] *pgd=81401031, *pte=00000000, *ppte=00000000
> >Internal error: Oops: 817 [#1]
> >Modules linked in:
> >CPU: 0 Not tainted (2.6.22.18-omap3 #29)
> >PC is at consistent_sync+0x40/0xa4
> >LR is at usb_hcd_submit_urb+0x7b0/0x8b4
> >pc : [<c00315ac>] lr : [<c02307e0>] psr: 20000013
> >sp : c1403c48 ip : c1403c58 fp : c1403c54
> >r10: ffff8003 r9 : 00000020 r8 : 00000020
> >r7 : c483dc20 r6 : c0569000 r5 : c23c040c r4 : ff2d2000
> >r3 : 00000000 r2 : 00000002 r1 : ff2dba38 r0 : ff2d2000
> >Flags: nzCv IRQs on FIQs on Mode SVC_32 Segment user
> >Control: 00c5387f Table: 854d8018 DAC: 00000015
> >
> >Do you get some clue from this about what is happening?

there must be a backtrace right after that, can you paste it as well?

--
balbi