On 06/24/2014 07:02 PM, Russell King - ARM Linux wrote: > On Tue, Jun 24, 2014 at 06:54:26PM +0900, Alexandre Courbot wrote: >> From: Lucas Stach <dev at lynxeye.de> >> >> On architectures for which access to GPU memory is non-coherent, >> caches need to be flushed and invalidated explicitly at the >> appropriate places. Introduce two small helpers to make things >> easy for TTM-based drivers. > > Have you run this with DMA API debugging enabled? I suspect you haven't, > and I recommend that you do.
# cat /sys/kernel/debug/dma-api/error_count 162621 (??????? ???)
