Re: Symbol not found. Error while inserting usb hcd module

Alan Stern <[email protected]>
Newsgroups gmane.linux.usb.devel
Message-ID <[email protected]>
On Sat, 8 Sep 2007, Kaustubh Ashtekar wrote:

> I am currently working on a i.MX21 ARM9 board, which has a USB host port.
> After some searching I got the host HCD driver for the processor. I compiled
> the driver (and also the USB subsystem) as a modules. After Linux booted
> properly on the board I then did insmod on the modules one by one according 
> To the dependencies as given in the modules.dep file as given below
> 
> /lib/modules/2.6.16QCam-vc/kernel/drivers/usb/core/usbcore.ko:
...

> All the other modules load properly. However, when I do insmod on
> 'imx21-hcd.ko' at last then it gives the following error:
> 
> imx21_hcd: Unknown symbol platform_driver_unregister
> imx21_hcd: Unknown symbol platform_driver_register
> insmod: cannot insert 'imx21-hcd.ko': Unknown symbol in module (-1): No such
> file or directory
> 
> Has anybody come across this problem before? 
  
It's a pretty safe bet that the host controller driver source you found
was meant for a later kernel version than 2.6.16.

Alan Stern


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