From: Robert Hancock <hancockrwd@xxxxxxxxx> Date: Fri, 26 Feb 2010 21:08:04 -0600 > That seems like a reasonable approach to me. Only question is how to > implement the check for DMA_64BIT. Can we just check page_to_phys on > each of the pages in the skb to see if it's > 0xffffffff ? Are there > any architectures where it's more complicated than that? On almost every platform it's "more complicated than that". This is the whole issue. What matters is the final DMA address and since we have IOMMUs and the like, it is absolutely not tenable to solve this by checking physical address attributes. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
