serial: imx: optimization: remove the workqueues for DMA

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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>

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Huang Shijie 2013-10-15 15:23:40 +08:00 • committed by Greg Kroah-Hartman

parent f0ef8834b2

commit 7cb92fd2a0

1 changed files with 10 additions and 44 deletions

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54

drivers/tty/serial/imx.c

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