Re: sys_open() return -ENXIO when booting kernel

[Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>]

On Mon, Aug 21, 2006 at 08:51:45PM +0800, ?????? wrote:
>  On Mon, Aug 21, 2006 at 05:57:24PM +0800, ?????? wrote:
> > I trace kernel and find tty->driver->open calls uart_open() function.
> > And I think uart_get() give ENXIO finally.
> >  
> > I want to know why ENXIO return.  May be rootfs has no the device opend?
> 
> Because there was no UART registered for that, or there was and it has been
> subsequently marked for removal.
> 
> (If you want better help, please publish your source code.)
> 
> OK.
> 
> The follow is my uart driver source code. And I have not modify the other
> kernel file, for example, main.c, tty_io.c, serial_core.c, open.c, etc.
> Please check it.
>
> static struct device_driver vdavinci_driver = {
> 	.name		= "vdavinci_uart",
> 	.bus		= &platform_bus_type,

Do you have a corresponding platform device registered?

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