Re: [linux-usb-devel] Bug in devio.c

[David Brownell]

oliverthered wrote:

On Wed, 2003-01-15 at 17:42, David Brownell wrote:

+		if(!(ep_desc = usb_epnum_to_ep_desc(ps->dev, uurb.endpoint)))
+			return -ENOENT;
+		interval = ep_desc->bInterval;
+		

Shouldn't it be "interval = 1 << (ep_desc->bInterval -1);" instead?
For iso, bInterval is always a log2 encoding.

Is this also true for interrupt or just ISO?

What it says in the USB 2.0 spec: true for high speed interrupt
as well as all ISO endpoints.

Full and low speed interrupt endpoints use a linear encoding
(with an effective max interval 128msec).





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