Re: [34-longterm 024/247] USB: prevent buggy hubs from crashing theUSB stack

From: Alan Stern
Date: Thu Jun 23 2011 - 14:48:16 EST

On Thu, 23 Jun 2011, Paul Gortmaker wrote:

> From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> -------------------
> This is a commit scheduled for the next v2.6.34 longterm release.
> If you see a problem with using this for longterm, please comment.
> -------------------
> commit d199c96d41d80a567493e12b8e96ea056a1350c1 upstream.
> If anyone comes across a high-speed hub that (by mistake or by design)
> claims to have no Transaction Translators, plugging a full- or
> low-speed device into it will cause the USB stack to crash. This
> patch (as1446) prevents the problem by ignoring such devices, since
> the kernel has no way to communicate with them.

This commit had some unexpected fallout. It shouldn't be merged unless
the following upstream commits are also merged:


Alan Stern

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