24 Jun
2011
24 Jun
'11
8:39 a.m.
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