[PATCH 2/2] drm/radeon: clarify why we evict vram twice on suspend

[Alex Deucher]

Update the comment to explain why we do this.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/radeon/radeon_device.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index eb92aef4..79c9b6f 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1651,7 +1651,10 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 
 	radeon_suspend(rdev);
 	radeon_hpd_fini(rdev);
-	/* evict remaining vram memory */
+	/* evict remaining vram memory
+	 * This second call to evict vram is to evict the gart page table
+	 * using the CPU.
+	 */
 	radeon_bo_evict_vram(rdev);
 
 	radeon_agp_suspend(rdev);
-- 
2.5.5