diff options
| author | Ioana Ciornei <ioana.ciornei@nxp.com> | 2020-07-21 12:19:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-21 16:53:34 +0200 |
| commit | 70476feb62ce9955b8101fca84f3f8b3788e6eb2 (patch) | |
| tree | fa6ed4f9171ae76602f348506f7c8223f7365c34 /drivers/staging/fsl-dpaa2 | |
| parent | 1867a402d801d93f9f9b24fdaef1bc84b9debd5d (diff) | |
staging: dpaa2-ethsw: check if there is space for a new VLAN
Avoid getting into a WARNING as below by checking, while in the prepare
state of the transactional operation, if there is space for a new VLAN.
If we reached the maximum number, return an appropriate error.
[ 6503.657564] eth3: Commit of object (id=1) failed.
[ 6503.657588] WARNING: CPU: 2 PID: 17144 at net/switchdev/switchdev.c:277 switchdev_port_obj_add_now+0xcc/0x110
...
[ 6503.657628] x1 : 70887ce26695c500 x0 : 0000000000000000
[ 6503.657630] Call trace:
[ 6503.657633] switchdev_port_obj_add_now+0xcc/0x110
[ 6503.657635] switchdev_port_obj_add+0x40/0xc0
[ 6503.657638] br_switchdev_port_vlan_add+0x50/0x78
[ 6503.657640] __vlan_add+0x2dc/0x758
[ 6503.657642] nbp_vlan_add+0xc0/0x180
[ 6503.657644] br_vlan_info.isra.0+0x68/0x128
[ 6503.657646] br_process_vlan_info+0x224/0x2f8
[ 6503.657647] br_afspec+0x158/0x188
[ 6503.657649] br_setlink+0x1a4/0x290
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20200721091919.20394-7-ioana.ciornei@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/fsl-dpaa2')
| -rw-r--r-- | drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c index 4165594551e0..316fd9afd461 100644 --- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c +++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c @@ -979,10 +979,27 @@ static int port_vlans_add(struct net_device *netdev, struct switchdev_trans *trans) { struct ethsw_port_priv *port_priv = netdev_priv(netdev); - int vid, err = 0; + struct ethsw_core *ethsw = port_priv->ethsw_data; + struct dpsw_attr *attr = ðsw->sw_attr; + int vid, err = 0, new_vlans = 0; + + if (switchdev_trans_ph_prepare(trans)) { + for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) + if (!port_priv->ethsw_data->vlans[vid]) + new_vlans++; + + /* Check if there is space for a new VLAN */ + err = dpsw_get_attributes(ethsw->mc_io, 0, ethsw->dpsw_handle, + ðsw->sw_attr); + if (err) { + netdev_err(netdev, "dpsw_get_attributes err %d\n", err); + return err; + } + if (attr->max_vlans - attr->num_vlans < new_vlans) + return -ENOSPC; - if (switchdev_trans_ph_prepare(trans)) return 0; + } for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) { if (!port_priv->ethsw_data->vlans[vid]) { |