Alan Stern wrote:
Come to think of it, there really is almost no difference between an
unsolicited device reset and a power-off suspend (except that one is
quicker than the other). No difference at all as far as anything in the
USB stack is concerned, it seems to me.
Actually there is a difference. One retains VBUS power, and the other one doesn't -- it's pretty significant, actually.
For example, a bus-powered device would lose its firmware updates when VBUS is lost, and need much more re-initialization (commonly a couple more enumerations in addition to one or more firmware updates) before it can even get to the same "device reset" stage.
- Dave
-------------------------------------------------------
This SF.Net email sponsored by Black Hat Briefings & Training.
Attend Black Hat Briefings & Training, Las Vegas July 24-29 - digital self defense, top technical experts, no vendor pitches, unmatched networking opportunities. Visit www.blackhat.com
_______________________________________________
[EMAIL PROTECTED]
To unsubscribe, use the last form field at:
https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
