From: Subash Abhinov Kasiviswanathan <subas...@codeaurora.org>
Date: Mon, 12 Mar 2018 20:26:06 -0600
> diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
> b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
> index 6ce31e2..65b074e 100644
> --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
> +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map.h
> @@ -44,7 +44,7 @@ struct rmnet_map_header {
> u8 reserved_bit:1;
> u8 cd_bit:1;
> u8 mux_id;
> - u16 pkt_len;
> + __be16 pkt_len;
> } __aligned(1);
>
> struct rmnet_map_dl_csum_trailer {
...
> diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
> b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
> index c74a6c5..4e342a3 100644
> --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
> +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c
> @@ -307,7 +307,8 @@ struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
> return NULL;
>
> maph = (struct rmnet_map_header *)skb->data;
> - packet_len = ntohs(maph->pkt_len) + sizeof(struct rmnet_map_header);
> + packet_len = ntohs((__force __be16)maph->pkt_len) +
> + sizeof(struct rmnet_map_header);
>
> if (port->data_format & RMNET_INGRESS_FORMAT_MAP_CKSUMV4)
> packet_len += sizeof(struct rmnet_map_dl_csum_trailer);
> @@ -316,7 +317,7 @@ struct sk_buff *rmnet_map_deaggregate(struct sk_buff *skb,
> return NULL;
>
> /* Some hardware can send us empty frames. Catch them */
> - if (ntohs(maph->pkt_len) == 0)
> + if (ntohs((__force __be16)maph->pkt_len) == 0)
> return NULL;
>
> skbn = alloc_skb(packet_len + RMNET_MAP_DEAGGR_SPACING, GFP_ATOMIC);
Ummm, if you change pkt_len to be a proper __be16, then you don't need these
casts when passing it to ntohs().
