netdev - [PATCH net-next 10/11] can: m_can: Disable unused interrupts

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 27 Mar 2023 09:33:53 +0200
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, linux-can@...r.kernel.org,
        kernel@...gutronix.de,
        Markus Schneider-Pargmann <msp@...libre.com>,
        Simon Horman <simon.horman@...igine.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 10/11] can: m_can: Disable unused interrupts

From: Markus Schneider-Pargmann <msp@...libre.com>

There are a number of interrupts that are not used by the driver at the
moment. Disable all of these.

Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
Reviewed-by: Simon Horman <simon.horman@...igine.com>
Link: https://lore.kernel.org/all/20230315110546.2518305-5-msp@baylibre.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/m_can/m_can.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 5274d9642566..e7aceeba3759 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -1261,6 +1261,7 @@ static int m_can_set_bittiming(struct net_device *dev)
 static int m_can_chip_config(struct net_device *dev)
 {
 	struct m_can_classdev *cdev = netdev_priv(dev);
+	u32 interrupts = IR_ALL_INT;
 	u32 cccr, test;
 	int err;
 
@@ -1270,6 +1271,11 @@ static int m_can_chip_config(struct net_device *dev)
 		return err;
 	}
 
+	/* Disable unused interrupts */
+	interrupts &= ~(IR_ARA | IR_ELO | IR_DRX | IR_TEFF | IR_TEFW | IR_TFE |
+			IR_TCF | IR_HPM | IR_RF1F | IR_RF1W | IR_RF1N |
+			IR_RF0F | IR_RF0W);
+
 	m_can_config_endisable(cdev, true);
 
 	/* RX Buffer/FIFO Element Size 64 bytes data field */
@@ -1364,15 +1370,13 @@ static int m_can_chip_config(struct net_device *dev)
 	m_can_write(cdev, M_CAN_TEST, test);
 
 	/* Enable interrupts */
-	if (!(cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING))
+	if (!(cdev->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) {
 		if (cdev->version == 30)
-			m_can_write(cdev, M_CAN_IE, IR_ALL_INT &
-				    ~(IR_ERR_LEC_30X));
+			interrupts &= ~(IR_ERR_LEC_30X);
 		else
-			m_can_write(cdev, M_CAN_IE, IR_ALL_INT &
-				    ~(IR_ERR_LEC_31X));
-	else
-		m_can_write(cdev, M_CAN_IE, IR_ALL_INT);
+			interrupts &= ~(IR_ERR_LEC_31X);
+	}
+	m_can_write(cdev, M_CAN_IE, interrupts);
 
 	/* route all interrupts to INT0 */
 	m_can_write(cdev, M_CAN_ILS, ILS_ALL_INT0);
-- 
2.39.2