From: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Date: Fri, 30 Jul 2010 05:13:22 +0000 (-0700)
Subject: USB: xhci: Set DMA mask for host.
X-Git-Tag: v2.6.36-rc1~293^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=006d5820b41b298328e6b6085e4d58129fbc78f0;p=pandora-kernel.git

USB: xhci: Set DMA mask for host.

Tell the USB core that we can do DMA directly (instead of needing it to
memory-map the buffers for PIO).  If the xHCI host supports 64-bit addresses,
set the DMA mask accordingly.  Otherwise indicate the host can handle 32-bit DMA
addresses.

This improves performance because the USB core doesn't have to spend time
remapping buffers in high memory into the 32-bit address range.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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