ALSA: line6: Use kmemdup in podhd_set_monitor_level()

Use kmemdup rather than duplicating its implementation.

Signed-off-by: YueHaibing <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Takashi Iwai <[email protected]>

Author: YueHaibing

sound/usb/line6/podhd.c

@@ -293,12 +293,10 @@ static void podhd_set_monitor_level(struct usb_line6_podhd *podhd, int value)
 	};
 	unsigned char *buf;
 
-	buf = kmalloc(sizeof(msg), GFP_KERNEL);
+	buf = kmemdup(msg, sizeof(msg), GFP_KERNEL);
 	if (!buf)
 		return;
 
-	memcpy(buf, msg, sizeof(msg));
-
 	if (value < 0)
 		value = 0;