Messages in this thread |  | | Date | Tue, 23 Jun 2009 10:21:29 +0100 | From | Alan Cox <> | Subject | Re: PROBLEM: kernel oops with g_serial USB gadget on 2.6.30 |
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> that g_serial driver interacts with tty layer in that packet_done callback, > so this is the source of the problems. I noticed that some other UDC > drivers also does all its job from an interrupt, so they also might be > affected. How this bug should be properly resolved?
Either by not setting ->low_latency or by running the data paths from a non IRQ context.
Basically: don't set tty->low_latency if you are handling the processing from the IRQ path. The only case low_latency is useful is handling data from a non-IRQ path where you have latency concerns for tx/rx switching.
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