linux-kernel - [PATCH 5.15 128/317] Bluetooth: Remove superfluous call to hci_conn_check

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Date: Sun, 24 Mar 2024 19:31:48 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Jonas Dreßler <verdre@...d.nl>,
	Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 128/317] Bluetooth: Remove superfluous call to hci_conn_check_pending()

From: Jonas Dreßler <verdre@...d.nl>

[ Upstream commit 78e3639fc8031275010c3287ac548c0bc8de83b1 ]

The "pending connections" feature was originally introduced with commit
4c67bc74f016 ("[Bluetooth] Support concurrent connect requests") and
6bd57416127e ("[Bluetooth] Handling pending connect attempts after
inquiry") to handle controllers supporting only a single connection request
at a time. Later things were extended to also cancel ongoing inquiries on
connect() with commit 89e65975fea5 ("Bluetooth: Cancel Inquiry before
Create Connection").

With commit a9de9248064b ("[Bluetooth] Switch from OGF+OCF to using only
opcodes"), hci_conn_check_pending() was introduced as a helper to
consolidate a few places where we check for pending connections (indicated
by the BT_CONNECT2 flag) and then try to connect.

This refactoring commit also snuck in two more calls to
hci_conn_check_pending():

- One is in the failure callback of hci_cs_inquiry(), this one probably
makes sense: If we send an "HCI Inquiry" command and then immediately
after a "Create Connection" command, the "Create Connection" command might
fail before the "HCI Inquiry" command, and then we want to retry the
"Create Connection" on failure of the "HCI Inquiry".

- The other added call to hci_conn_check_pending() is in the event handler
for the "Remote Name" event, this seems unrelated and is possibly a
copy-paste error, so remove that one.

Fixes: a9de9248064b ("[Bluetooth] Switch from OGF+OCF to using only opcodes")
Signed-off-by: Jonas Dreßler <verdre@...d.nl>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bluetooth/hci_event.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index ba7242729a8fb..0be37a5c1c0c2 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3072,8 +3072,6 @@ static void hci_remote_name_evt(struct hci_dev *hdev, struct sk_buff *skb)

 	BT_DBG("%s", hdev->name);

-	hci_conn_check_pending(hdev);
-
 	hci_dev_lock(hdev);

 	conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
-- 
2.43.0