lkml.org 
[lkml]   [2020]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net v4] net: ethernet: ti: cpsw_new: fix error handling in cpsw_ndo_vlan_rx_kill_vid()
Date
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
\
 
 \ /
  Last update: 2020-08-27 16:52    [W:0.053 / U:0.268 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site