Re: [PATCH 5/7] can: clear ctrlmode when close candev
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: 2014-11-03 16:28:48
Also in:
linux-arm-kernel, linux-can
On 10/29/2014 11:45 AM, Dong Aisheng wrote:
Currently priv->ctrlmode is not cleared when close_candev, so next time the driver will still use this value to set controller even user does not set any ctrl mode. e.g. Step 1. ip link set can0 up type can0 bitrate 1000000 loopback on Controller will be in loopback mode Step 2. ip link set can0 down Step 3. ip link set can0 up type can0 bitrate 1000000 Controller will still be set to loopback mode in driver due to saved priv->ctrlmode. This patch clears priv->ctrlmode when the CAN interface is closed, and set it to correct mode according to next user setting.
Oliver, what do you think of this patch? It will introduce a subtle change to the userspace. Marc
quoted hunk ↗ jump to hunk
Signed-off-by: Dong Aisheng <redacted> --- drivers/net/can/dev.c | 1 + 1 file changed, 1 insertion(+)diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 02492d2..1fce485 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c@@ -671,6 +671,7 @@ void close_candev(struct net_device *dev) del_timer_sync(&priv->restart_timer); can_flush_echo_skb(dev); + priv->ctrlmode = 0; } EXPORT_SYMBOL_GPL(close_candev);
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