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| author |   Huang Shijie <b32955@freescale.com> | 2014-05-23 12:40:40 +0800 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-28 12:41:32 -0700 |
| commit | e2f2786606d49d3aae545c61c04757a64cf7e5f0 (patch) | |
| tree | 6ac161033ca9b36ddaa3a87bbf3a956f967be000 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | serial: imx: remove the redundant code (diff) | |
| download | linux-dev-e2f2786606d49d3aae545c61c04757a64cf7e5f0.tar.xz linux-dev-e2f2786606d49d3aae545c61c04757a64cf7e5f0.zip | |
serial: imx: remove the DMA wait queue
The DMA wait queue makes the code very complicated:
For RX, the @->stop_rx hook does not really stop the RX;
For TX, the @->stop_tx hook does not really stop the TX.
The above make the imx_shutdown has to wait the RX/TX DMA to be finished.
In order to make code more simple, this patch removes the DMA wait queue.
By calling the dmaengine_terminate_all, this patch makes the RX stops
immediately after we call the @->stop_rx hook, so does the TX.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions