Commit 637ba54f authored Jun 17, 2016 by Ludovic Desroches Committed by Greg Kroah-Hartman Jun 25, 2016

tty/serial: atmel: add comment for the ring buffer size macro



There is a macro named ATMEL_SERIAL_RINGSIZE which suggesting that it
corresponds to the real size of the ring buffer. Let warn people that
there is a factor of four since allocation size is
sizeof(struct atmel_uart_char) * ATMEL_SERIAL_RINGSIZE.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 00e8e658

drivers/tty/serial/atmel_serial.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -108,6 +108,12 @@ struct atmel_uart_char {
		u16 ch;
		};

		/*
		* Be careful, the real size of the ring buffer is
		* sizeof(atmel_uart_char) * ATMEL_SERIAL_RINGSIZE. It means that ring buffer
		* can contain up to 1024 characters in PIO mode and up to 4096 characters in
		* DMA mode.
		*/
		#define ATMEL_SERIAL_RINGSIZE 1024

		/*