On 03/20/2014 08:48 PM, Bollinger, Seth wrote:
Yeah, you're right; thanks for catching this.
(I was busy looking at the ll driver and completely missed the bug in
the serial core).
uart_start() should not be conditioning the call to start_tx() on
the ring buffer being empty; ll drivers should already be able to handle
that because CTS flow control change will start_tx regardless of the ring
buffer count.
Will you send a patch?
Sure thing. Just to be clear, you want to remove the ring buffer tests
and leave the tty tests, right?
Yes. I would remove the NULL ptr test for xmit.buf as well. That way
we can uncover any bugs in the ll drivers that mistakenly depend on it.
The !stopped and !hw_stopped tests must remain.
This will have to wait for the morning though. :)
Take your time. TTY/serial trees are closed until 3.15-rc1 anyway.
Please be sure to address the patch to the serial maintainers.
You can cc me in the patch.
Thanks again,
Peter Hurley
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