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serial: mrst_max3110: some code cleanup
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The cleanup for mrst_max3110 includes:
* remove unneeded head files
* make the spi_transfer dma safe, so that driver is more portable
* add more check for error return value
* use mutex_trylock for read thread

Signed-off-by: Feng Tang <[email protected]>
Signed-off-by: Alan Cox <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
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@ftang1 @gregkh
ftang1 authored and gregkh committed Oct 22, 2010
1 parent b670bde commit ee9b450
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