From 7b360f4287e52802b8c62e0608737e8bbfda67e1 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 13 Aug 2013 19:35:43 +0200
Subject: [PATCH] usb: musb: honour the return value of dma_map_single()

Since dma_map_single() may fail it is good to actually check the return
code to see if it succeeded.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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