[PATCH v2 1/3] Bluetooth: hci_bcm4377: treat only negative hci_register_dev() returns as errors

[Andre Eikmeyer <dev@deq.rocks>]

If another controller already holds hci0, a USB Bluetooth dongle for
example, the BCM4377 is registered as hci1 and probe returns 1. The PCI
core takes that as success, but the devm action that unregisters the
controller is never added, so it stays registered after unbind while
its driver data is freed.

hci_register_dev() returns the index of the new controller on success.
Check for a negative return, as the other drivers do.

Fixes: 8a06127602de ("Bluetooth: hci_bcm4377: Add new driver for BCM4377 PCIe boards")
Signed-off-by: Andre Eikmeyer <dev@deq.rocks>
---
 drivers/bluetooth/hci_bcm4377.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_bcm4377.c b/drivers/bluetooth/hci_bcm4377.c
index 66d49b47154..da0a48c2be3 100644
--- a/drivers/bluetooth/hci_bcm4377.c
+++ b/drivers/bluetooth/hci_bcm4377.c
@@ -2410,7 +2410,7 @@ static int bcm4377_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		return ret;
 
 	ret = hci_register_dev(hdev);
-	if (ret)
+	if (ret < 0)
 		return ret;
 	return devm_add_action_or_reset(&pdev->dev, bcm4377_hci_unregister_dev,
 					hdev);