From: Huang Shijie <b32955@freescale.com>
Date: Fri, 11 Oct 2013 10:31:00 +0000 (+0800)
Subject: serial: imx: fix the wrong number of scatterlist entries when xmit->head is 0
X-Git-Tag: omap-for-v3.13/fixes-for-merge-window-take2~63^2~27
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=947c74eba85bff743bc15adbdd9193ffff60c29f;p=pandora-kernel.git

serial: imx: fix the wrong number of scatterlist entries when xmit->head is 0

When the (xmit->tail > xmit->head) is true and the xmit->head is 0,
we only need one DMA scatterlist in actually. Current code uses two DMA
scatterlists in this case, this is obviously wrong.

This patch fixes it.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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