From 2d3b7d6e7dc8785f9a6c0e4d38188dd1a0859d11 Mon Sep 17 00:00:00 2001
From: Andrew Jackson <Andrew.Jackson@arm.com>
Date: Fri, 7 Nov 2014 14:14:47 +0000
Subject: [PATCH] serial: pl011: Don't enable RX DMA if residue processing not
 supported

If the DMA engine doesn't support residue processing then the RX DMA
handling won't work terribly well if polling is enabled.  So, disable
RX DMA if residue handling isn't available.

Signed-off-by: Andrew Jackson <Andrew.Jackson@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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