git.itanic.dy.fi Git - linux-stable/commit

author	Sam Bobroff <sbobroff@linux.ibm.com>
	Sun, 17 Nov 2019 23:53:54 +0000 (10:53 +1100)
committer	Alex Deucher <alexander.deucher@amd.com>
	Fri, 22 Nov 2019 19:35:10 +0000 (14:35 -0500)
commit	3d0e3ce52ce3eb4b9de3caf9c38dbb5a4d3e13c3
tree	07e978376b56b18bb9c6ca65c31f2b4fd5f44b6d	tree \| snapshot
parent	62d91dd2851e8ae2ca552f1b090a3575a4edf759	commit \| diff

drm/amdgpu: fix bad DMA from INTERRUPT_CNTL2

The INTERRUPT_CNTL2 register expects a valid DMA address, but is
currently set with a GPU MC address. This can cause problems on
systems that detect the resulting DMA read from an invalid address
(found on a Power8 guest).

Instead, use the DMA address of the dummy page because it will always
be safe.

Fixes: 27ae10641e9c ("drm/amdgpu: add interupt handler implementation for si v3")
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>