linux-kernel - [PATCH AUTOSEL 6.1 3/5] net: qrtr: ns: Return 0 if server port is not present

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Date: Mon,  8 Jan 2024 07:28:14 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Sarannya S <quic_sarannya@...cinc.com>,
	Simon Horman <horms@...nel.org>,
	"David S . Miller" <davem@...emloft.net>,
	Sasha Levin <sashal@...nel.org>,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	linux-arm-msm@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 6.1 3/5] net: qrtr: ns: Return 0 if server port is not present

From: Sarannya S <quic_sarannya@...cinc.com>

[ Upstream commit 9bf2e9165f90dc9f416af53c902be7e33930f728 ]

When a 'DEL_CLIENT' message is received from the remote, the corresponding
server port gets deleted. A DEL_SERVER message is then announced for this
server. As part of handling the subsequent DEL_SERVER message, the name-
server attempts to delete the server port which results in a '-ENOENT' error.
The return value from server_del() is then propagated back to qrtr_ns_worker,
causing excessive error prints.
To address this, return 0 from control_cmd_del_server() without checking the
return value of server_del(), since the above scenario is not an error case
and hence server_del() doesn't have any other error return value.

Signed-off-by: Sarannya Sasikumar <quic_sarannya@...cinc.com>
Reviewed-by: Simon Horman <horms@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/qrtr/ns.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/qrtr/ns.c b/net/qrtr/ns.c
index 3e40a1ba48f79..4a13b9f7abb44 100644
--- a/net/qrtr/ns.c
+++ b/net/qrtr/ns.c
@@ -569,7 +569,9 @@ static int ctrl_cmd_del_server(struct sockaddr_qrtr *from,
 	if (!node)
 		return -ENOENT;

-	return server_del(node, port, true);
+	server_del(node, port, true);
+
+	return 0;
 }

 static int ctrl_cmd_new_lookup(struct sockaddr_qrtr *from,
-- 
2.43.0