netdev - [PATCH] Bluetooth: hci_core: Use ERR

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Message-Id: <20220717133759.8479-1-khalid.masum.92@gmail.com>
Date:   Sun, 17 Jul 2022 19:37:58 +0600
From:   Khalid Masum <khalid.masum.92@...il.com>
To:     linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org
Cc:     Shuah Khan <skhan@...uxfoundation.org>,
        Pavel Skripkin <paskripkin@...il.com>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        linux-bluetooth@...r.kernel.org, netdev@...r.kernel.org,
        Khalid Masum <khalid.masum.92@...il.com>
Subject: [PATCH] Bluetooth: hci_core: Use ERR_PTR instead of NULL

Failure of kzalloc to allocate memory is not reported. Return Error
pointer to ENOMEM if memory allocation fails. This will increase
readability and will make the function easier to use in future.

Signed-off-by: Khalid Masum <khalid.masum.92@...il.com>
---
 drivers/bluetooth/btusb.c | 4 ++--
 net/bluetooth/hci_core.c  | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index e25fcd49db70..3407762b3b15 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3692,8 +3692,8 @@ static int btusb_probe(struct usb_interface *intf,
 	data->recv_acl = hci_recv_frame;
 
 	hdev = hci_alloc_dev_priv(priv_size);
-	if (!hdev)
-		return -ENOMEM;
+	if (IS_ERR(hdev))
+		return PTR_ERR(hdev);
 
 	hdev->bus = HCI_USB;
 	hci_set_drvdata(hdev, data);
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index a0f99baafd35..ea50767e02bf 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2419,7 +2419,7 @@ struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
 
 	hdev = kzalloc(alloc_size, GFP_KERNEL);
 	if (!hdev)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
 	hdev->esco_type = (ESCO_HV1);
-- 
2.36.1