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[net-next,5/6] net: ethernet: ti: am65-cpsw-ethtool: configured critical setting only when no running netdevs

Message ID 20200626181709.22635-6-grygorii.strashko@ti.com
State New
Headers show
Series net: ethernet: ti: am65-cpsw: update and enable sr2.0 soc | expand

Commit Message

Grygorii Strashko June 26, 2020, 6:17 p.m. UTC 
Ensure that critical setting can only be configured when there are no
running netdevs - all ports are down.

Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>

---
 drivers/net/ethernet/ti/am65-cpsw-ethtool.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

-- 
2.17.1
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Patch

diff --git a/drivers/net/ethernet/ti/am65-cpsw-ethtool.c b/drivers/net/ethernet/ti/am65-cpsw-ethtool.c
index f7b33875a385..496dafb25128 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-ethtool.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-ethtool.c
@@ -445,7 +445,7 @@  static int am65_cpsw_set_channels(struct net_device *ndev,
 	/* Check if interface is up. Can change the num queues when
 	 * the interface is down.
 	 */
-	if (netif_running(ndev))
+	if (common->usage_count)
 		return -EBUSY;
 
 	am65_cpsw_nuss_remove_tx_chns(common);
@@ -734,6 +734,9 @@  static int am65_cpsw_set_ethtool_priv_flags(struct net_device *ndev, u32 flags)
 
 	rrobin = !!(flags & AM65_CPSW_PRIV_P0_RX_PTYPE_RROBIN);
 
+	if (common->usage_count)
+		return -EBUSY;
+
 	if (common->est_enabled && rrobin) {
 		netdev_err(ndev,
 			   "p0-rx-ptype-rrobin flag conflicts with QOS\n");