[media] ene-ir: Fix cleanup on probe failure

This makes the cleanup on probe failure more consistent with other
drivers. This is similar to what commit
f27b853ea24a9b70585f9251384d97929e6551c3 ("[media] rc: Fix invalid
free_region and/or free_irq on probe failure") did for some other
drivers.
In addition to making the cleanup more consistent, this also fixes a
case where (on a ene_hw_detect failure) free_region would be called on a
region that was not requested yet.
This last problem was probably introduced by the moving of code in
commit b31b021988fed9e3741a46918f14ba9b063811db ("[media] ene_ir: Fix
driver initialisation") and commit
9ef449c6b31bb6a8e6dedc24de475a3b8c79be20 ("[media] rc: Postpone ISR
registration").

Signed-off-by: Matthijs Kooijman <[e-mail]>
Cc: Maxim Levitsky <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/rc/ene_ir.c

···
 	dev = kzalloc(sizeof(struct ene_device), GFP_KERNEL);
 	rdev = rc_allocate_device();
 	if (!dev || !rdev)
-		goto error1;
+		goto failure;
 
 	/* validate resources */
 	error = -ENODEV;
···
 
 	if (!pnp_port_valid(pnp_dev, 0) ||
 	    pnp_port_len(pnp_dev, 0) < ENE_IO_SIZE)
-		goto error;
+		goto failure;
 
 	if (!pnp_irq_valid(pnp_dev, 0))
-		goto error;
+		goto failure;
 
 	spin_lock_init(&dev->hw_lock);
 
···
 	/* detect hardware version and features */
 	error = ene_hw_detect(dev);
 	if (error)
-		goto error;
+		goto failure;
 
 	if (!dev->hw_learning_and_tx_capable && txsim) {
 		dev->hw_learning_and_tx_capable = true;
···
 	/* claim the resources */
 	error = -EBUSY;
 	if (!request_region(dev->hw_io, ENE_IO_SIZE, ENE_DRIVER_NAME)) {
-		dev->hw_io = -1;
-		dev->irq = -1;
-		goto error;
+		goto failure;
 	}
 
 	dev->irq = pnp_irq(pnp_dev, 0);
 	if (request_irq(dev->irq, ene_isr,
 			IRQF_SHARED, ENE_DRIVER_NAME, (void *)dev)) {
-		dev->irq = -1;
-		goto error;
+		goto failure2;
 	}
 
 	error = rc_register_device(rdev);
 	if (error < 0)
-		goto error;
+		goto failure3;
 
 	pr_notice("driver has been successfully loaded\n");
 	return 0;
-error:
-	if (dev && dev->irq >= 0)
-		free_irq(dev->irq, dev);
-	if (dev && dev->hw_io >= 0)
-		release_region(dev->hw_io, ENE_IO_SIZE);
-error1:
+
+failure3:
+	free_irq(dev->irq, dev);
+failure2:
+	release_region(dev->hw_io, ENE_IO_SIZE);
+failure:
 	rc_free_device(rdev);
 	kfree(dev);
 	return error;