diff --git a/drivers/media/dvb-frontends/tda1004x.c b/drivers/media/dvb-frontends/tda1004x.c
index 35d72b46aa1e..a2631be7ffac 100644
--- a/drivers/media/dvb-frontends/tda1004x.c
+++ b/drivers/media/dvb-frontends/tda1004x.c
@@ -329,6 +329,7 @@ static int tda1004x_do_upload(struct tda1004x_state *state,
 	tda1004x_write_byteI(state, dspCodeCounterReg, 0);
 	fw_msg.addr = state->config->demod_address;
 
+	i2c_lock_adapter(state->i2c);
 	buf[0] = dspCodeInReg;
 	while (pos != len) {
 		// work out how much to send this time
@@ -339,15 +340,18 @@ static int tda1004x_do_upload(struct tda1004x_state *state,
 		// send the chunk
 		memcpy(buf + 1, mem + pos, tx_size);
 		fw_msg.len = tx_size + 1;
-		if (i2c_transfer(state->i2c, &fw_msg, 1) != 1) {
+		if (__i2c_transfer(state->i2c, &fw_msg, 1) != 1) {
 			printk(KERN_ERR "tda1004x: Error during firmware upload\n");
+			i2c_unlock_adapter(state->i2c);
 			return -EIO;
 		}
 		pos += tx_size;
 
 		dprintk("%s: fw_pos=0x%x\n", __func__, pos);
 	}
-	// give the DSP a chance to settle 03/10/05 Hac
+	i2c_unlock_adapter(state->i2c);
+
+	/* give the DSP a chance to settle 03/10/05 Hac */
 	msleep(100);
 
 	return 0;