[PATCH] USB: io_edgeport locking, flow control, and misc fixes
[PATCH] io_edgeport locking, flow control, and misc fixes - Updated to version 2.7. - Added locking to protect the circular buffer, txCredits, rxBytesAvail, and read_in_progress. - With these locking fixes tests running 8 ports at 115200 bps on SMP now runs for hours without problems; before these changes this test would cause out of memory errors or oopses within minutes. - Removed the RELEVANT_IFLAG macro which mistakenly filtered out the software flow control stty flags. - Added support for mark and space parity. - Added a private read_in_progress flag rather than using (urb->status == -EINPROGRESS). - Low latency is now a module parameter, it is on by default. - Added edge_tty_recv to pass data to the tty flip buffers. - Cleared the write_urb pointer after freeing it, to prevent oops on failed open. - Cleared the txfifo.fifo pointer after freeing it, to prevent double free on failed open. - Simplified rounding the baud rate divisor. - Added some error messages. Signed-off-by: Al Borchers <alborchers@steinerpoint.com> Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
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