|author||Christopher Daniel Emmons <firstname.lastname@example.org>||Wed Jul 02 16:11:54 2014 -0700|
|committer||Chris Emmons <email@example.com>||Tue Jan 13 16:21:41 2015 -0600|
ARM: Fix broken coherency for DMA ops This fixes a problem with dc zva/WriteInvalidate testing on v7. The The system has coherent I/O and the kernel needs to know this. What would happen is the IO cache would hold DMA descriptor information in Exclusive state and the core would send uncacheable requests that effectively bypassed the coherence. The IO device would then act on incoherent data.