diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/util.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/util.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c index 6b399976d6c..2864c74bdb6 100644 --- a/drivers/net/wireless/mwifiex/util.c +++ b/drivers/net/wireless/mwifiex/util.c @@ -167,6 +167,28 @@ int mwifiex_recv_packet(struct mwifiex_adapter *adapter, struct sk_buff *skb) skb->dev = priv->netdev; skb->protocol = eth_type_trans(skb, priv->netdev); skb->ip_summed = CHECKSUM_NONE; + + /* This is required only in case of 11n and USB as we alloc + * a buffer of 4K only if its 11N (to be able to receive 4K + * AMSDU packets). In case of SD we allocate buffers based + * on the size of packet and hence this is not needed. + * + * Modifying the truesize here as our allocation for each + * skb is 4K but we only receive 2K packets and this cause + * the kernel to start dropping packets in case where + * application has allocated buffer based on 2K size i.e. + * if there a 64K packet received (in IP fragments and + * application allocates 64K to receive this packet but + * this packet would almost double up because we allocate + * each 1.5K fragment in 4K and pass it up. As soon as the + * 64K limit hits kernel will start to drop rest of the + * fragments. Currently we fail the Filesndl-ht.scr script + * for UDP, hence this fix + */ + if ((adapter->iface_type == MWIFIEX_USB) && + (skb->truesize > MWIFIEX_RX_DATA_BUF_SIZE)) + skb->truesize += (skb->len - MWIFIEX_RX_DATA_BUF_SIZE); + priv->stats.rx_bytes += skb->len; priv->stats.rx_packets++; if (in_interrupt()) |