On Mon, Jun 01, 2015 at 10:51:06AM +0530, Bhuvanchandra DV wrote:

+    /*
+     * CTS/RTS can _only_ be handled
+     * automatically by the hardware.
+     */

That's really not acceptable.  You need to do something here so that you
can _force_ RTS to be deasserted when the kernel buffers fill up - be
that by stopping reading characters and letting the FIFO fill up or
something of that ilk.

Ignoring the rest of the flow control system in the kernel is not really
acceptable.

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