From ce4b4f228e51219b0b79588caf73225b08b5b779 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Michel=20D=C3=A4nzer?= Date: Fri, 24 Mar 2017 19:01:09 +0900 Subject: [PATCH] drm/radeon: Override fpfn for all VRAM placements in radeon_evict_flags MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We were accidentally only overriding the first VRAM placement. For BOs with the RADEON_GEM_NO_CPU_ACCESS flag set, radeon_ttm_placement_from_domain creates a second VRAM placment with fpfn == 0. If VRAM is almost full, the first VRAM placement with fpfn > 0 may not work, but the second one with fpfn == 0 always will (the BO's current location trivially satisfies it). Because "moving" the BO to its current location puts it back on the LRU list, this results in an infinite loop. Fixes: 2a85aedd117c ("drm/radeon: Try evicting from CPU accessible to inaccessible VRAM first") Reported-by: Zachary Michaels Reported-and-Tested-by: Julien Isorce Reviewed-by: Christian König Reviewed-by: Alex Deucher Signed-off-by: Michel Dänzer Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- drivers/gpu/drm/radeon/radeon_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c index 684f170..aaa3e80 100644 --- a/drivers/gpu/drm/radeon/radeon_ttm.c +++ b/drivers/gpu/drm/radeon/radeon_ttm.c @@ -213,8 +213,8 @@ static void radeon_evict_flags(struct ttm_buffer_object *bo, rbo->placement.num_busy_placement = 0; for (i = 0; i < rbo->placement.num_placement; i++) { if (rbo->placements[i].flags & TTM_PL_FLAG_VRAM) { - if (rbo->placements[0].fpfn < fpfn) - rbo->placements[0].fpfn = fpfn; + if (rbo->placements[i].fpfn < fpfn) + rbo->placements[i].fpfn = fpfn; } else { rbo->placement.busy_placement = &rbo->placements[i]; -- 2.7.4