media: lirc: no need to recalculate duration

This is code existed for when drivers would send less than the whole
buffer; no driver does this any more, so this is redundant. Drivers
should return -EINVAL if they cannot send the entire buffer.
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/rc/lirc_dev.c

@@ -347,15 +347,6 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
 	if (ret < 0)
 		goto out_kfree;
 
-	if (fh->send_mode == LIRC_MODE_SCANCODE) {
-		ret = n;
-	} else {
-		for (duration = i = 0; i < ret; i++)
-			duration += txbuf[i];
-
-		ret *= sizeof(unsigned int);
-	}
-
 	/*
 	 * The lircd gap calculation expects the write function to
 	 * wait for the actual IR signal to be transmitted before
@@ -368,6 +359,7 @@ static ssize_t ir_lirc_transmit_ir(struct file *file, const char __user *buf,
 		schedule_timeout(usecs_to_jiffies(towait));
 	}
 
+	ret = n;
 out_kfree:
 	kfree(txbuf);
 	kfree(raw);