On Wed, Mar 20, 2002, Maksim Krasnyanskiy <[EMAIL PROTECTED]> wrote: > > > > I meant any part of USB core. Whoever calls disconnect > > > could potentially tell HCD to cancel all requests on this device. > > > >The "potential" is that substantial (b) rework. > Ok. I'll give it more thinking and may be propose something later. Gotta > study USB code a bit more :). > > Just to give you guys an update on Bluetooth USB driver status and > outstanding issues. > First of all, huge thanks to all who replied. Based on our discussion I did > bunch of fixes in Bluetooth USB driver > and it seems to work fine with all HCDs and weird Bluetooth USB devices > now. Basically I don't free URBs in the completion > handler any more. I also make sure that I don't send more than one ctrl > packet at time even if I get interrupt before ctrl completion. > And I protect my completion handlers with appropriate lock to make sure > that they aren't running when I flush urb queues and > cleanup stuff. So everything seems to be ok, no complains from uses so far. > > Here is list of outstanding issues: > - uhci HCD has to be fixed to not call completion handler if submit_urb failed. > It's still an issue because drivers do not expect that.
This has already been done. Greg has the patch and should make it into the release kernels soon. You can find the patch on the linux-usb mailing list. > - One shot interrupt transfer using USBDEVFS API. > Couple of kernel releases ago we (Greg and I) added support for one shot > interrupts to devio.c. Basically it's just a normal > interrupt request with urb->interval == 0. > It works just fine with uhci.c. usb-uhci returns ECONNABORTED even for > successful transfer but it can be ignored and works. > And it totally doesn't work with ohci. REAP_URB ioctl never returns and if > device is unplugged machine crashes badly. > I need interrupt transfers for my user space USB firmware loader for > Broadcom USB devices. ECONNABORTED would imply an asynchronous unlink. I wonder if usbdevfs is a bit buggy there. JE _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
