Re: REGRESSION: usbdevfs:Use-scatter-gather-lists-for-large-bulk-transfers

[Henrik Rydberg]

Hi Alan,

> Instead of introducing a new local variable, why not simply update 
> uurb->buffer?  That's what we do elsewhere in the code.

It seemed fragile, due to these scary lines:

	if (is_in && uurb->buffer_length > 0)
		as->userbuffer = uurb->buffer;
	else
		as->userbuffer = NULL;

I suppose it works in this particular case.  How is the
USBDEVFS_URB_TYPE_CONTROL case supposed to work here?

I can certainly change the patch if preferred. Tested and attached
below.

Thanks,
Henrik