[PATCH net 04/13] ice: always do GCS if hardware supports it

[Tony Nguyen <anthony.l.nguyen@intel.com>]

From: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>

There is no need to check for NETIF_HW_CSUM. If the code reach
calculating checksum it means that correct checksum flags are set,
because kernel is checking that when setting ip->summed.

Instead of netdev feature flag use Tx ring flag to check if the hardware
can use special descriptor for checksum calculating.

Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Alexander Nowlin <alexander.nowlin@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
---
 drivers/net/ethernet/intel/ice/ice_lib.c  | 4 ++++
 drivers/net/ethernet/intel/ice/ice_txrx.c | 2 +-
 drivers/net/ethernet/intel/ice/ice_txrx.h | 1 +
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 8cdc4fda89e9..fc9d4e0fa755 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -1415,6 +1415,10 @@ static int ice_vsi_alloc_rings(struct ice_vsi *vsi)
 			set_bit(ICE_TX_RING_FLAGS_VLAN_L2TAG2, ring->flags);
 		else
 			set_bit(ICE_TX_RING_FLAGS_VLAN_L2TAG1, ring->flags);
+
+		if (ice_is_feature_supported(pf, ICE_F_GCS))
+			set_bit(ICE_TX_RING_FLAGS_GCS, ring->flags);
+
 		WRITE_ONCE(vsi->tx_rings[i], ring);
 	}
 
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.c b/drivers/net/ethernet/intel/ice/ice_txrx.c
index c04c5856dad6..b2063a54d6d8 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.c
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.c
@@ -1739,7 +1739,7 @@ int ice_tx_csum(struct ice_tx_buf *first, struct ice_tx_offload_params *off)
 	l3_len = l4.hdr - ip.hdr;
 	offset |= (l3_len / 4) << ICE_TX_DESC_LEN_IPLEN_S;
 
-	if ((tx_ring->netdev->features & NETIF_F_HW_CSUM) &&
+	if (test_bit(ICE_TX_RING_FLAGS_GCS, tx_ring->flags) &&
 	    !(first->tx_flags & ICE_TX_FLAGS_TSO) &&
 	    !skb_csum_is_sctp(skb)) {
 		/* Set GCS */
diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h
index 5e517f219379..15dbd5100912 100644
--- a/drivers/net/ethernet/intel/ice/ice_txrx.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.h
@@ -217,6 +217,7 @@ enum ice_tx_ring_flags {
 	ICE_TX_RING_FLAGS_VLAN_L2TAG1,
 	ICE_TX_RING_FLAGS_VLAN_L2TAG2,
 	ICE_TX_RING_FLAGS_TXTIME,
+	ICE_TX_RING_FLAGS_GCS,
 	ICE_TX_RING_FLAGS_NBITS,
 };
 
-- 
2.47.1