tree 8d78d1a4f6c8c7599b77750176e4a284f2e1791e
parent 97877deb0920674e00a555c2c660f8bab90cdbc8
author Christian König <christian.koenig@amd.com> 1401888596 +0200
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074830 +0200

drm/radeon: stop poisoning the GART TLB

commit 0986c1a55ca64b44ee126a2f719a6e9f28cbe0ed upstream.

When we set the valid bit on invalid GART entries they are
loaded into the TLB when an adjacent entry is loaded. This
poisons the TLB with invalid entries which are sometimes
not correctly removed on TLB flush.

For stable inclusion the patch probably needs to be modified a bit.

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>