media: dvb-frontends: fix a memory leak bug

In cx24117_load_firmware(), 'buf' is allocated through kmalloc() to hold
the firmware. However, if i2c_transfer() fails, it is not deallocated,
leading to a memory leak bug.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/dvb-frontends/cx24117.c

@@ -619,8 +619,10 @@ static int cx24117_load_firmware(struct dvb_frontend *fe,
 
 	/* send fw */
 	ret = i2c_transfer(state->priv->i2c, &msg, 1);
-	if (ret < 0)
+	if (ret < 0) {
+		kfree(buf);
 		return ret;
+	}
 
 	kfree(buf);