From: Ajay Kumar Gupta <ajay.gupta@ti.com>
Date: Fri, 20 Jul 2012 05:37:22 +0000 (+0530)
Subject: usb: musb: host: don't program dma for zero byte tx
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~73^2~138^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3132122c664dd9361e2179e8a388d87ca89ace6c;p=pandora-kernel.git

usb: musb: host: don't program dma for zero byte tx

This is to reduce the overhead of dma programming for zero byte
transmit as same can be done using pio mode.

Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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