serial: mrst_max3110: some code cleanup
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 <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/serial/mrst_max3110.h b/drivers/serial/mrst_max3110.h
index 363478a..d1ef43a 100644
--- a/drivers/serial/mrst_max3110.h
+++ b/drivers/serial/mrst_max3110.h
@@ -56,4 +56,5 @@
#define WC_BAUD_DR192 (0xE)
#define WC_BAUD_DR384 (0xF)
+#define M3110_RX_FIFO_DEPTH 8
#endif