Hi, I am writing n/w device driver for sdio wifi card. I am testing it on embedded platform. DMA controller on the platform is able to xfer data to sdio only if source data buf address is 4 byte aligned. The firmware on the card understands 802.3 frames with snap headers. So, I convert it to the required format in my driver. 4 byte additional header is also attached to this frame and sent over sdio. This all conversion effectively adds 12 byes to the frame received in hard_xmit method. Problem is, frame received in hard_xmit method is 2 byte aligned. (skb->data is 2 byte aligned). As a result, after addition of 12 bytes header, skb->data remains 2 byte aligned instead of 4 byte aligned. And DMA controller refuses to transfer it. So, how can I request IP stack so that frame received in hard_xmit is on 4 byte aligned boundry? I believe setting NET_IP_ALIGN will only matter in rx path. is this correct? Thanks in advance. Regards, Kalpesh -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
