Sarah Sharp 006d5820b4
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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