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* [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer
@ 2021-09-06  9:42 Ziyang Xuan
  2021-09-10 12:35 ` Oleksij Rempel
  2021-10-17 10:40 ` Marc Kleine-Budde
  0 siblings, 2 replies; 3+ messages in thread
From: Ziyang Xuan @ 2021-09-06  9:42 UTC (permalink / raw)
  To: robin; +Cc: linux, socketcan, mkl, davem, kuba, linux-can, netdev, linux-kernel

When the session state is J1939_SESSION_DONE, j1939_tp_rxtimer() will
give an alert "rx timeout, send abort", but do nothing actually.
Move the alert into session active judgment condition, it is more
reasonable.

One of the scenarioes is that j1939_tp_rxtimer() execute followed by
j1939_xtp_rx_abort_one(). After j1939_xtp_rx_abort_one(), the session
state is J1939_SESSION_DONE, then j1939_tp_rxtimer() give an alert.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
---
 net/can/j1939/transport.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index 0f8309314075..d3f0a062b400 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -1226,12 +1226,11 @@ static enum hrtimer_restart j1939_tp_rxtimer(struct hrtimer *hrtimer)
 		session->err = -ETIME;
 		j1939_session_deactivate(session);
 	} else {
-		netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n",
-			     __func__, session);
-
 		j1939_session_list_lock(session->priv);
 		if (session->state >= J1939_SESSION_ACTIVE &&
 		    session->state < J1939_SESSION_ACTIVE_MAX) {
+			netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n",
+				     __func__, session);
 			j1939_session_get(session);
 			hrtimer_start(&session->rxtimer,
 				      ms_to_ktime(J1939_XTP_ABORT_TIMEOUT_MS),
-- 
2.25.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer
  2021-09-06  9:42 [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer Ziyang Xuan
@ 2021-09-10 12:35 ` Oleksij Rempel
  2021-10-17 10:40 ` Marc Kleine-Budde
  1 sibling, 0 replies; 3+ messages in thread
From: Oleksij Rempel @ 2021-09-10 12:35 UTC (permalink / raw)
  To: Ziyang Xuan
  Cc: robin, linux, socketcan, mkl, davem, kuba, linux-can, netdev,
	linux-kernel

On Mon, Sep 06, 2021 at 05:42:19PM +0800, Ziyang Xuan wrote:
> When the session state is J1939_SESSION_DONE, j1939_tp_rxtimer() will
> give an alert "rx timeout, send abort", but do nothing actually.
> Move the alert into session active judgment condition, it is more
> reasonable.
> 
> One of the scenarioes is that j1939_tp_rxtimer() execute followed by
> j1939_xtp_rx_abort_one(). After j1939_xtp_rx_abort_one(), the session
> state is J1939_SESSION_DONE, then j1939_tp_rxtimer() give an alert.
> 
> Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
> Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>

Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>

Thank you!

> ---
>  net/can/j1939/transport.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
> 
> diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
> index 0f8309314075..d3f0a062b400 100644
> --- a/net/can/j1939/transport.c
> +++ b/net/can/j1939/transport.c
> @@ -1226,12 +1226,11 @@ static enum hrtimer_restart j1939_tp_rxtimer(struct hrtimer *hrtimer)
>  		session->err = -ETIME;
>  		j1939_session_deactivate(session);
>  	} else {
> -		netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n",
> -			     __func__, session);
> -
>  		j1939_session_list_lock(session->priv);
>  		if (session->state >= J1939_SESSION_ACTIVE &&
>  		    session->state < J1939_SESSION_ACTIVE_MAX) {
> +			netdev_alert(priv->ndev, "%s: 0x%p: rx timeout, send abort\n",
> +				     __func__, session);
>  			j1939_session_get(session);
>  			hrtimer_start(&session->rxtimer,
>  				      ms_to_ktime(J1939_XTP_ABORT_TIMEOUT_MS),
> -- 
> 2.25.1
> 
> 

-- 
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31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
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^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer
  2021-09-06  9:42 [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer Ziyang Xuan
  2021-09-10 12:35 ` Oleksij Rempel
@ 2021-10-17 10:40 ` Marc Kleine-Budde
  1 sibling, 0 replies; 3+ messages in thread
From: Marc Kleine-Budde @ 2021-10-17 10:40 UTC (permalink / raw)
  To: Ziyang Xuan
  Cc: robin, linux, socketcan, davem, kuba, linux-can, netdev, linux-kernel

[-- Attachment #1: Type: text/plain, Size: 1016 bytes --]

On 06.09.2021 17:42:19, Ziyang Xuan wrote:
> When the session state is J1939_SESSION_DONE, j1939_tp_rxtimer() will
> give an alert "rx timeout, send abort", but do nothing actually.
> Move the alert into session active judgment condition, it is more
> reasonable.
> 
> One of the scenarioes is that j1939_tp_rxtimer() execute followed by
             scenarios

Typo fixed while applying.

> j1939_xtp_rx_abort_one(). After j1939_xtp_rx_abort_one(), the session
> state is J1939_SESSION_DONE, then j1939_tp_rxtimer() give an alert.
> 
> Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
> Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>

Added to linux-can/testing, added stable on Cc.

Thanks,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde           |
Embedded Linux                   | https://www.pengutronix.de  |
Vertretung West/Dortmund         | Phone: +49-231-2826-924     |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-5555 |

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^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2021-10-17 10:41 UTC | newest]

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2021-09-06  9:42 [PATCH net] can: j1939: fix errant alert in j1939_tp_rxtimer Ziyang Xuan
2021-09-10 12:35 ` Oleksij Rempel
2021-10-17 10:40 ` Marc Kleine-Budde

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