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Fri, 30 Jan 2026 09:49:14 -0800 (PST) Received: from junjungu-PC.localdomain ([2408:820c:9008:ba52:53f:14bb:e0fe:f839]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3540f3cc7absm9062114a91.12.2026.01.30.09.49.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 30 Jan 2026 09:49:13 -0800 (PST) From: Felix Gu Date: Sat, 31 Jan 2026 01:49:09 +0800 Subject: [PATCH] cache: ax45mp: Fix device node reference leak in ax45mp_cache_init() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260131-ax45mp-v1-1-a566905c5c8a@gmail.com> X-B4-Tracking: v=1; b=H4sIABTvfGkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDIzMDQ2ND3cQKE9PcAl1jMwOT1GRzszQLcwsloOKCotS0zAqwQdGxtbUA5Sb ti1gAAAA= X-Change-ID: 20260131-ax45mp-3604ec76f878 To: Conor Dooley , Jonathan Cameron , Lad Prabhakar , Palmer Dabbelt Cc: Conor Dooley , linux-kernel@vger.kernel.org, Felix Gu X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1769795350; l=1315; i=ustc.gu@gmail.com; h=from:subject:message-id; bh=pGO+t4MHPEnE+vMCaKEaXxENuS4Xfl+7/50dC/P/5+s=; b=bE6OsxNS9oEzlbTPtJafX/XKrPr+RL0JwFTUYPMRNo8KvUUiihTgmUiRoqtnXxi5gIhA6iwd3 wDUPUCpV3N7BxdRuKQr5VygLBa9GvUd+Tf7ART7PiwznHklMAF2zLQO X-Developer-Key: i=ustc.gu@gmail.com; a=ed25519; pk=fjUXwmjchVN7Ja6KGP55IXOzFeCl9edaHoQIEUA+/hw= In ax45mp_cache_init(), of_find_matching_node() returns a device node with an incremented reference count that must be released with of_node_put(). The current code fails to call of_node_put() which causes a reference leak. Use the __free(device_node) attribute to ensure automatic cleanup when the variable goes out of scope. Fixes: d34599bcd2e4 ("cache: Add L2 cache management for Andes AX45MP RISC-= V core") Signed-off-by: Felix Gu --- drivers/cache/ax45mp_cache.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/cache/ax45mp_cache.c b/drivers/cache/ax45mp_cache.c index 1d7dd3d2c101..934c5087ec2b 100644 --- a/drivers/cache/ax45mp_cache.c +++ b/drivers/cache/ax45mp_cache.c @@ -178,11 +178,11 @@ static const struct of_device_id ax45mp_cache_ids[] = =3D { =20 static int __init ax45mp_cache_init(void) { - struct device_node *np; struct resource res; int ret; =20 - np =3D of_find_matching_node(NULL, ax45mp_cache_ids); + struct device_node *np __free(device_node) =3D + of_find_matching_node(NULL, ax45mp_cache_ids); if (!of_device_is_available(np)) return -ENODEV; =20 --- base-commit: 33a647c659ffa5bdb94abc345c8c86768ff96215 change-id: 20260131-ax45mp-3604ec76f878 Best regards, --=20 Felix Gu