netdev - [PATCH net-next 05/22] can: mcp251xfd: mcp251xfd_open(): open

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 for Android: free password hash cracker in your pocket

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

Message-Id: <20220108214345.1848470-6-mkl@pengutronix.de>
Date:   Sat,  8 Jan 2022 22:43:28 +0100
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, Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 05/22] can: mcp251xfd: mcp251xfd_open(): open_candev() first

This patch exchanges the order of open_candev() and
pm_runtime_get_sync(), so that open_candev() is called first.

A usual reason why open_candev() fails is missing CAN bit rate
configuration. It makes no sense to resume the device from PM sleep
first just to put it to sleep if the bit rate is not configured.

Link: https://lore.kernel.org/all/20220105154300.1258636-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
index bf2ebd46ff83..161e12cdf8e8 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c
@@ -2503,19 +2503,19 @@ static int mcp251xfd_open(struct net_device *ndev)
 	const struct spi_device *spi = priv->spi;
 	int err;
 
+	err = open_candev(ndev);
+	if (err)
+		return err;
+
 	err = pm_runtime_get_sync(ndev->dev.parent);
 	if (err < 0) {
 		pm_runtime_put_noidle(ndev->dev.parent);
-		return err;
+		goto out_close_candev;
 	}
 
-	err = open_candev(ndev);
-	if (err)
-		goto out_pm_runtime_put;
-
 	err = mcp251xfd_ring_alloc(priv);
 	if (err)
-		goto out_close_candev;
+		goto out_pm_runtime_put;
 
 	err = mcp251xfd_transceiver_enable(priv);
 	if (err)
@@ -2551,11 +2551,11 @@ static int mcp251xfd_open(struct net_device *ndev)
 	mcp251xfd_transceiver_disable(priv);
  out_mcp251xfd_ring_free:
 	mcp251xfd_ring_free(priv);
- out_close_candev:
-	close_candev(ndev);
  out_pm_runtime_put:
 	mcp251xfd_chip_stop(priv, CAN_STATE_STOPPED);
 	pm_runtime_put(ndev->dev.parent);
+ out_close_candev:
+	close_candev(ndev);
 
 	return err;
 }
-- 
2.34.1