dwc_otg: fix locking around dequeueing and killing URBs #2927
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kill_urbs_in_qh_list() is practically only ever called with the fiq lock already held, so don't spinlock twice in the case where we need to cancel an isochronous transfer. Also fix up a case where the global interrupt register could be read with the fiq lock not held. Fixes the deadlock seen in raspberrypi#2907
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Fine by me. |
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kill_urbs_in_qh_list() is practically only ever called with the fiq lock
already held, so don't spinlock twice in the case where we need to cancel
an isochronous transfer.
Also fix up a case where the global interrupt register could be read with
the fiq lock not held.
Fixes the deadlock seen in #2907