On Tue, Jun 21, 2011 at 01:47:03PM +0200, Marek Szyprowski wrote: > > I also think that it is better to attach and to detach dma_map_ops > > dynamically. > > What's the point of such operations? Why do you want to change dma > mapping methods in runtime? That is dangerous. You have to make sure that there are no mappings granted to the the device driver before changing the dma_ops of a device at runtime. Otherwise existing mappings for a device may disappear and confuse the driver and the device. Joerg -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>