Public bug reported:
When using libusb-0.1 to poll an interrupt endpoint I discovered that after 64
timeouts that I could no-longer request any further data. Relevant syslog:
--
Jul 21 17:11:31 kgw2 kernel: [ 1261.579022] xhci_hcd 0000:01:00.0: ERROR no
room on ep ring
Jul 21 17:11:31 kgw2 kernel: [ 1261.579025] usb 9-3: usbfs: usb_submit_urb
returned -12
--
After looking through the libusb code and finding no possible explanation I
then moved my device to a USB 2.0 port on the PC and the problem disappeared.
I'm experiencing this problem on Ubuntu 11.04 (kernel "Ubuntu
2.6.38-10.46-generic 2.6.38.7") and I can dig into this a lot more if necessary.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
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https://bugs.launchpad.net/bugs/814682
Title:
USB 3.0 (xhci_hcd) fails to discard URBs
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