Re: drivers for spectrometer device and ARM SAM-BA USB Bootloader

Am Montag, 1. Juni 2009 06:52:35 schrieb Александр Лясин:
> Thank you for your comments!
>
> > static ssize_t at91sam_write (struct file *file,
> >                const char __user *buffer, size_t count, loff_t *ppos) {
> >        int retval=0,
> >            count_bytes,
> >            needed_write_bytes=0;
> >        char addrbuf[ADDRESS_SIZE+1],
> >             lendata[ADDRESS_SIZE+1],
> >
> > DMA on the stack. On some architectures this will fail.
>
> Give me please, how should I proceed in this case? kzalloc? Then it
> will work longer

Yes, kmalloc or kzalloc will give you buffers you can pass on to usbcore.

	Regards
		Oliver

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