linux-kernel - [PATCH AUTOSEL 6.12 093/107] Bluetooth: hci_conn: Reduce hci_conn

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Message-ID: <20241124133301.3341829-93-sashal@kernel.org>
Date: Sun, 24 Nov 2024 08:29:53 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Markus Elfring <elfring@...rs.sourceforge.net>,
	Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
	Sasha Levin <sashal@...nel.org>,
	marcel@...tmann.org,
	johan.hedberg@...il.com,
	luiz.dentz@...il.com,
	linux-bluetooth@...r.kernel.org
Subject: [PATCH AUTOSEL 6.12 093/107] Bluetooth: hci_conn: Reduce hci_conn_drop() calls in two functions

From: Markus Elfring <elfring@...rs.sourceforge.net>

[ Upstream commit d96b543c6f3b78b6440b68b5a5bbface553eff28 ]

An hci_conn_drop() call was immediately used after a null pointer check
for an hci_conn_link() call in two function implementations.
Thus call such a function only once instead directly before the checks.

This issue was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bluetooth/hci_conn.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index c4c74b82ed211..50e65b2f54ee6 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -2224,13 +2224,9 @@ struct hci_conn *hci_bind_bis(struct hci_dev *hdev, bdaddr_t *dst,
 					  conn->iso_qos.bcast.big);
 	if (parent && parent != conn) {
 		link = hci_conn_link(parent, conn);
-		if (!link) {
-			hci_conn_drop(conn);
-			return ERR_PTR(-ENOLINK);
-		}
-
-		/* Link takes the refcount */
 		hci_conn_drop(conn);
+		if (!link)
+			return ERR_PTR(-ENOLINK);
 	}
 
 	return conn;
@@ -2320,15 +2316,12 @@ struct hci_conn *hci_connect_cis(struct hci_dev *hdev, bdaddr_t *dst,
 	}
 
 	link = hci_conn_link(le, cis);
+	hci_conn_drop(cis);
 	if (!link) {
 		hci_conn_drop(le);
-		hci_conn_drop(cis);
 		return ERR_PTR(-ENOLINK);
 	}
 
-	/* Link takes the refcount */
-	hci_conn_drop(cis);
-
 	cis->state = BT_CONNECT;
 
 	hci_le_create_cis_pending(hdev);
-- 
2.43.0