option to ignore flash memory device at USB1.1 "full" speed

David Woodhouse dwmw2 at infradead.org
Sun Jun 16 21:11:42 UTC 2013


On Sun, 2013-06-16 at 05:38 +0100, Matthew Garrett wrote:
> On Sat, Jun 15, 2013 at 08:24:33AM -0700, John Reiser wrote:
> > How can I force the system not to recognize a USB2.0 flash memory
> device at USB1.1 speed?
> 
> You can't - it's negotiated at the host controller level, the OS isn't
> involved.

You can't force it to use USB2 mode when for some reason it's negotiated
something slower. But you can *detect* that it's connected as a USB1
device and refuse to mount it, surely? And then the user will unplug it
and plug it in again, until it works correctly.

-- 
dwmw2

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