Documentation: rs485: Do not define manually the ioctl

It is not a very good practice to define the IOCTL manually instead of using the header file. Fix it on the documentation example. Signed-off-by: Ricardo Ribalda Delgado <[email protected]> Signed-off-by: Jonathan Corbet <[email protected]>
ambv · Aug 18, 2016 · 5021bb9 · 5021bb9
1 parent 7a9011d
commit 5021bb9
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/Documentation/serial/serial-rs485.txt b/Documentation/serial/serial-rs485.txt
@@ -45,9 +45,8 @@
 
 	#include <linux/serial.h>
 
-	/* RS485 ioctls: */
-	#define TIOCGRS485      0x542E
-	#define TIOCSRS485      0x542F
+	/* Include definition for RS485 ioctls: TIOCGRS485 and TIOCSRS485 */
+	#include <sys/ioctl.h>
 
 	/* Open your specific device (e.g., /dev/mydevice): */
 	int fd = open ("/dev/mydevice", O_RDWR);