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-rw-r--r--include/linux/usb/serial.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 09a3e6a..655341d 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -17,7 +17,8 @@
#include <linux/mutex.h>
#define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
-#define SERIAL_TTY_MINORS 255 /* loads of devices :) */
+#define SERIAL_TTY_MINORS 254 /* loads of devices :) */
+#define SERIAL_TTY_NO_MINOR 255 /* No minor was assigned */
/* The maximum number of ports one device can grab at once */
#define MAX_NUM_PORTS 8
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