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* [PATCH net v4] net: ethernet: ti: cpsw_new: fix error handling in cpsw_ndo_vlan_rx_kill_vid()
@ 2020-08-27 13:21 Murali Karicheri
  0 siblings, 0 replies; 3+ messages in thread
From: Murali Karicheri @ 2020-08-27 13:21 UTC (permalink / raw)
  To: davem, kuba, grygorii.strashko, nsekhar, linux-omap, netdev,
	linux-kernel

This patch fixes a bunch of issues in cpsw_ndo_vlan_rx_kill_vid()

 - pm_runtime_get_sync() returns non zero value. This results in
   non zero value return to caller which will be interpreted as error.
   So overwrite ret with zero.
 - If VID matches with port VLAN VID, then set error code.
 - Currently when VLAN interface is deleted, all of the VLAN mc addresses
   are removed from ALE table, however the return values from ale function
   calls are not checked. These functions can return error code -ENOENT.
   But that shouldn't happen in a normal case. So add error print to
   catch the situations so that these can be investigated and addressed.
   return zero in these cases as these are not real error case, but only
   serve to catch ALE table update related issues and help address the
   same in the driver.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
---
 v4 - updated error message with name of the function failed.
 v3 - updated commit description to describe error check related to
      port vlan VID
 v2 - updated comments from Grygorii, also return error code if VID
 drivers/net/ethernet/ti/cpsw_new.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 8d0a2bc7128d..8ed78577cded 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -1032,19 +1032,34 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
 		return ret;
 	}
 
+	/* reset the return code as pm_runtime_get_sync() can return
+	 * non zero values as well.
+	 */
+	ret = 0;
 	for (i = 0; i < cpsw->data.slaves; i++) {
 		if (cpsw->slaves[i].ndev &&
-		    vid == cpsw->slaves[i].port_vlan)
+		    vid == cpsw->slaves[i].port_vlan) {
+			ret = -EINVAL;
 			goto err;
+		}
 	}
 
 	dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
-	cpsw_ale_del_vlan(cpsw->ale, vid, 0);
-	cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
-			   HOST_PORT_NUM, ALE_VLAN, vid);
-	cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
-			   0, ALE_VLAN, vid);
+	ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
+	ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
+				 HOST_PORT_NUM, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
+			ret);
+	ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
+				 0, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
+			ret);
 	cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
+	ret = 0;
 err:
 	pm_runtime_put(cpsw->dev);
 	return ret;
-- 
2.17.1


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

* Re: [PATCH net v4] net: ethernet: ti: cpsw_new: fix error handling in cpsw_ndo_vlan_rx_kill_vid()
  2020-08-27 14:38 Murali Karicheri
@ 2020-08-27 16:16 ` David Miller
  0 siblings, 0 replies; 3+ messages in thread
From: David Miller @ 2020-08-27 16:16 UTC (permalink / raw)
  To: m-karicheri2
  Cc: kuba, grygorii.strashko, nsekhar, linux-omap, netdev, linux-kernel

From: Murali Karicheri <m-karicheri2@ti.com>
Date: Thu, 27 Aug 2020 10:38:39 -0400

> This patch fixes a bunch of issues in cpsw_ndo_vlan_rx_kill_vid()
> 
>  - pm_runtime_get_sync() returns non zero value. This results in
>    non zero value return to caller which will be interpreted as error.
>    So overwrite ret with zero.
>  - If VID matches with port VLAN VID, then set error code.
>  - Currently when VLAN interface is deleted, all of the VLAN mc addresses
>    are removed from ALE table, however the return values from ale function
>    calls are not checked. These functions can return error code -ENOENT.
>    But that shouldn't happen in a normal case. So add error print to
>    catch the situations so that these can be investigated and addressed.
>    return zero in these cases as these are not real error case, but only
>    serve to catch ALE table update related issues and help address the
>    same in the driver.
> 
> Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>

Applied and queued up for -stable, thanks.

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

* [PATCH net v4] net: ethernet: ti: cpsw_new: fix error handling in cpsw_ndo_vlan_rx_kill_vid()
@ 2020-08-27 14:38 Murali Karicheri
  2020-08-27 16:16 ` David Miller
  0 siblings, 1 reply; 3+ messages in thread
From: Murali Karicheri @ 2020-08-27 14:38 UTC (permalink / raw)
  To: davem, kuba, grygorii.strashko, nsekhar, linux-omap, netdev,
	linux-kernel

This patch fixes a bunch of issues in cpsw_ndo_vlan_rx_kill_vid()

 - pm_runtime_get_sync() returns non zero value. This results in
   non zero value return to caller which will be interpreted as error.
   So overwrite ret with zero.
 - If VID matches with port VLAN VID, then set error code.
 - Currently when VLAN interface is deleted, all of the VLAN mc addresses
   are removed from ALE table, however the return values from ale function
   calls are not checked. These functions can return error code -ENOENT.
   But that shouldn't happen in a normal case. So add error print to
   catch the situations so that these can be investigated and addressed.
   return zero in these cases as these are not real error case, but only
   serve to catch ALE table update related issues and help address the
   same in the driver.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
---
 v4 - updated error message with name of the function failed.
 v3 - updated commit description to describe error check related to
      port vlan VID
 v2 - updated comments from Grygorii, also return error code if VID
 drivers/net/ethernet/ti/cpsw_new.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 8d0a2bc7128d..8ed78577cded 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -1032,19 +1032,34 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
 		return ret;
 	}
 
+	/* reset the return code as pm_runtime_get_sync() can return
+	 * non zero values as well.
+	 */
+	ret = 0;
 	for (i = 0; i < cpsw->data.slaves; i++) {
 		if (cpsw->slaves[i].ndev &&
-		    vid == cpsw->slaves[i].port_vlan)
+		    vid == cpsw->slaves[i].port_vlan) {
+			ret = -EINVAL;
 			goto err;
+		}
 	}
 
 	dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
-	cpsw_ale_del_vlan(cpsw->ale, vid, 0);
-	cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
-			   HOST_PORT_NUM, ALE_VLAN, vid);
-	cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
-			   0, ALE_VLAN, vid);
+	ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
+	ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
+				 HOST_PORT_NUM, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
+			ret);
+	ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
+				 0, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
+			ret);
 	cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
+	ret = 0;
 err:
 	pm_runtime_put(cpsw->dev);
 	return ret;
-- 
2.17.1


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

end of thread, other threads:[~2020-08-27 16:17 UTC | newest]

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2020-08-27 13:21 [PATCH net v4] net: ethernet: ti: cpsw_new: fix error handling in cpsw_ndo_vlan_rx_kill_vid() Murali Karicheri
2020-08-27 14:38 Murali Karicheri
2020-08-27 16:16 ` David Miller

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