tree 03787b19a1187f87a3d12b99b098fd40a98018d7
parent f0ef8834b280ebb6c271f155ea040bf4af6c1881
author Huang Shijie <b32955@freescale.com> 1381821820 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1381973130 -0700

serial: imx: optimization: remove the workqueues for DMA

I worried that the delay of the sdma_run_channel0() maybe too long for
interrupt context, so I added the workqueues for RX/TX DMA.

But tested with bluetooth device, I find that the delay of sdma_run_channel0()
is about 8us (tested in imx6dl sabreauto board). I think the delay
is acceptable.

This patch removes the RX/TX workqueues for DMA, it makes the
code more clear.

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