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Commit 348d753d authored by Subash Abhinov Kasiviswanathan's avatar Subash Abhinov Kasiviswanathan
Browse files

net: qualcomm: rmnet: Handle command packets with checksum trailer 



When using the MAPv4 packet format in conjunction with MAP commands,
a dummy DL checksum trailer will be appended to the packet. Before
this packet is sent out as an ACK, the DL checksum trailer needs to be
removed.

CRs-Fixed: 2156182
Change-Id: I6d97519a81692e86655abe85fce287ead075a40e
Signed-off-by: default avatarSubash Abhinov Kasiviswanathan <subashab@codeaurora.org>
parent 79993be4

drivers/net/ethernet/qualcomm/rmnet/rmnet_map_command.c

+15 −2
Original line number Diff line number Diff line
@@ -58,11 +58,24 @@ static u8 rmnet_map_do_flow_control(struct sk_buff *skb, 
}



static void rmnet_map_send_ack(struct sk_buff *skb,

			       unsigned char type)

			       unsigned char type,

			       struct rmnet_port *port)

{

	struct rmnet_map_control_command *cmd;

	int xmit_status;



	if (port->data_format & RMNET_INGRESS_FORMAT_MAP_CKSUMV4) {

		if (skb->len < sizeof(struct rmnet_map_header) +

		    RMNET_MAP_GET_LENGTH(skb) +

		    sizeof(struct rmnet_map_dl_csum_trailer)) {

			kfree_skb(skb);

			return;

		}



		skb_trim(skb, skb->len -

			 sizeof(struct rmnet_map_dl_csum_trailer));

	}



	skb->protocol = htons(ETH_P_MAP);



	cmd = RMNET_MAP_GET_CMD_START(skb);
@@ -100,5 +113,5 @@ void rmnet_map_command(struct sk_buff *skb, struct rmnet_port *port) 
		break;

	}

	if (rc == RMNET_MAP_COMMAND_ACK)

		rmnet_map_send_ack(skb, rc);

		rmnet_map_send_ack(skb, rc, port);

}