Messages in this thread | | | Subject | Re: [PATCH] Regression: Revert "Bluetooth: use buffer priority to mark URB_ISO_ASAP flag" | From | Marcel Holtmann <> | Date | Mon, 23 Jan 2012 10:03:35 +0100 |
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Hi Keith,
> URB_ISO_ASAP may only be used with iso end points, but this patch was > attempting to use it with a bulk endpoint. When DEBUG is defined in > the USB stack, it checks for invalid flags and returns -EINVAL instead > of actually transmitting the data. > > Signed-off-by: Keith Packard <keithp@keithp.com> > ---
a version of this patch should be already upstream or in stable trees. If you are sending this again, then it might slipped through. Johan?
> Ok, so this is a comedy of errors. The Bluetooth code is trying to use > an iso-specific flag (URB_ISO_ASAP) on a bulk endpoint, which is > invalid, but normally harmless. Unless the USB code is compiled for > debugging, in which case it checks a bunch for incorrect usage and > discards URBs which are wrong. > > As far as I'm concerned, #ifdef DEBUG code should never ever change > the behaviour of the code, and so I'd say the USB code is even more > broken than the bluetooth code...
And yes, this one is hilarious.
Regards
Marcel
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