tom.leiming@xxxxxxxxx wrote: > This patch copies skb->data of register out command to kmalloced buffer, > which is cacheline aligned(dma safe) and passed into usb hcd. Since the > data in register out command is not very much, we can ignore the > performance loss caused by the copy. Actually, the current code is correct, though a bit sub-optimal. The inital dev_alloc_skb() in ath9k_wmi_cmd() allocates a headroom for WMI header + HTC header. The headers are then pushed as the packet moves down through HTC. Finally, skb->data is passed to submit_urb(). To take care of cacheline alignment, you can just replace the dev_alloc_skb() with alloc_skb(). A patch is welcome. :-) Sujith -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
