Incoming packets have to be aligned or the IP stack becomes upset.
Make sure to shift them two bytes to achieve this.
Signed-off-by: Pierre Ossman <drzeus@xxxxxxxxx>
---
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 5b13705..56dd568 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -175,12 +175,20 @@ static int if_sdio_handle_data(struct if_sdio_card *card,
goto out;
}
- skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
+ skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
if (!skb) {
ret = -ENOMEM;
goto out;
}
+ /*
+ * The IP stack is littered with silly assumptions on alignment,
+ * so we need to do a bit of layering violation here and make
+ * assumptions about the size of the headers between us and the
+ * IP stack.
+ */
+ skb_reserve(skb, NET_IP_ALIGN);
+
data = skb_put(skb, size);
memcpy(data, buffer, size);
Attachment:
signature.asc
Description: PGP signature
