[PATCH AUTOSEL for 4.9 163/281] cxgb4: Fix netdev_features flag

[Sasha Levin]

From: Arjun Vynipadath <arjun@xxxxxxxxxxx>

[ Upstream commit 90592b9a35836bacd34d92a3aba7958756b6a7c0 ]

GRO is not supported by Chelsio HW when rx_csum is disabled.
Update the netdev features flag when rx_csum is modified.

Signed-off-by: Arjun Vynipadath <arjun@xxxxxxxxxxx>
Signed-off-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Ganesh Goudar <ganeshgr@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 0c2a32a305bc..3ec32d7c5866 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -2742,6 +2742,16 @@ static int cxgb_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
 	return -EOPNOTSUPP;
 }
 
+static netdev_features_t cxgb_fix_features(struct net_device *dev,
+					   netdev_features_t features)
+{
+	/* Disable GRO, if RX_CSUM is disabled */
+	if (!(features & NETIF_F_RXCSUM))
+		features &= ~NETIF_F_GRO;
+
+	return features;
+}
+
 static const struct net_device_ops cxgb4_netdev_ops = {
 	.ndo_open             = cxgb_open,
 	.ndo_stop             = cxgb_close,
@@ -2766,6 +2776,7 @@ static const struct net_device_ops cxgb4_netdev_ops = {
 #endif
 	.ndo_set_tx_maxrate   = cxgb_set_tx_maxrate,
 	.ndo_setup_tc         = cxgb_setup_tc,
+	.ndo_fix_features     = cxgb_fix_features,
 };
 
 #ifdef CONFIG_PCI_IOV
-- 
2.14.1