4.14-stable review patch. If anyone has any objections, please let me know.
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From: Claudiu Manoil claudiu.manoil@nxp.com
[ Upstream commit 590399ddf9561f2ed0839311c8ae1be21597ba68 ]
Don't include in the Rx bytecount of the packet sent up the stack: the FCB (frame control block), and the padding bytes inserted by the controller into the frame payload, nor the FCS. All these are being pulled out of the skb by gfar_process_frame(). This issue is old, likely from the driver's beginnings, however it was amplified by recent: commit d903ec77118c ("gianfar: simplify FCS handling and fix memory leak") which basically added the FCS to the Rx bytecount, and so brought this to my attention.
Signed-off-by: Claudiu Manoil claudiu.manoil@nxp.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/freescale/gianfar.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -3072,9 +3072,6 @@ static void gfar_process_frame(struct ne if (ndev->features & NETIF_F_RXCSUM) gfar_rx_checksum(skb, fcb);
- /* Tell the skb what kind of packet this is */ - skb->protocol = eth_type_trans(skb, ndev); - /* There's need to check for NETIF_F_HW_VLAN_CTAG_RX here. * Even if vlan rx accel is disabled, on some chips * RXFCB_VLN is pseudo randomly set. @@ -3145,13 +3142,15 @@ int gfar_clean_rx_ring(struct gfar_priv_ continue; }
+ gfar_process_frame(ndev, skb); + /* Increment the number of packets */ total_pkts++; total_bytes += skb->len;
skb_record_rx_queue(skb, rx_queue->qindex);
- gfar_process_frame(ndev, skb); + skb->protocol = eth_type_trans(skb, ndev);
/* Send the packet up the stack */ napi_gro_receive(&rx_queue->grp->napi_rx, skb);