Re: Best practice for loading platform modules

[Greg KH <greg@kroah.com>]

On Wed, Apr 29, 2009 at 03:15:13PM -0400, Chris Hallinan wrote:
> On Wed, Apr 29, 2009 at 2:44 PM, Greg KH <greg@kroah.com> wrote:
> > On Wed, Apr 29, 2009 at 02:31:49PM -0400, Chris Hallinan wrote:
> >> On Wed, Apr 29, 2009 at 2:12 PM, Greg KH <greg@kroah.com> wrote:
> >> > On Wed, Apr 29, 2009 at 11:11:35AM -0700, Greg KH wrote:
> >> >> On Wed, Apr 29, 2009 at 02:05:37PM -0400, Chris Hallinan wrote:
> >> >> > I have an OMAP3 board, and want usb (host mode) configured as a
> >> >> > loadable module.  Using a generic rule such as this:
> >> >> > RUN+="/sbin/modprobe -b $env{MODALIAS}"
> >> >> >
> >> >> > ends up passing "platform:musb_hdrc" to modprobe, which obviously
> >> >> > fails.
> >> >>
> >> >> Why would that fail?  Do you have the proper modalias in the kernel
> >> >> module to handle this?  If not, can you add it?
> >> >
> >> > I see:
> >> >        MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);
> >> > in the musb code, perhaps MUSB_DRIVER_NAME is not set correctly to be
> >> > "musb_hdrc" somehow?
> >>
> >> >From musb_core.c:
> >>
> >> #define MUSB_DRIVER_NAME "musb_hdrc"
> >> const char musb_driver_name[] = MUSB_DRIVER_NAME;
> >
> > Good, so you should be fine.
> >
> > Can you run:
> >        modprobe -n -v platform:musb_hdrc
> > on your system?
> >
> 
> # modprobe -n -v platform:musb_hdrc
> FATAL: Module platform:musb_hdrc not found.
> # modprobe --version
> module-init-tools version 3.7
> 
> But...
> 
> # modprobe -n -v musb_hdrc
> insmod /lib/modules/2.6.24_mvl5024/kernel/drivers/usb/core/usbcore.ko
> insmod /lib/modules/2.6.24_mvl5024/kernel/drivers/usb/musb/musb_hdrc.ko
> 
> Seems to be complaining about the "platform:" prefix, I think.  This
> is the very latest version of module-init-tools from git tree a couple
> days ago.

But your kernel is over a year old, not much we can do about that :)

I suggest poking your distro, it seems they need to provide a fix
for your kernel, nothing we can do here, everything works just fine with
the latest kernel releases from what I can tell.

good luck,

greg k-h