mwifiex: add support for Marvell USB8797 chipset
This patch supports Avastar 88W8797 chipset with USB interface.
The corresponding firmware image file is located at:
"mrvl/usb8797_uapsta.bin"
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Kiran Divekar <dkiran@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c
index 6b39997..2864c74 100644
--- a/drivers/net/wireless/mwifiex/util.c
+++ b/drivers/net/wireless/mwifiex/util.c
@@ -167,6 +167,28 @@
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())