On Tuesday 05 May 2015 11:09:38 Suravee Suthikulanit wrote:

However, codes in several places are making use of dma_map_ops without 
checking if the ops are NULL (i.e. 
include/asm-generic/dma-mapping-common.h and in arch-specific 
implementation). If setting it to NULL is what we are planning to 
support, we would need to scrub the current code to put NULL check. 
Also, would you consider if that is safe to do going forward?

I mean the dma_mask pointer, not dma_map_ops.

	Arnd