6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ma Ke <make24@xxxxxxxxxxx>
[ Upstream commit 3b9a33235c773c7a3768060cf1d2cf8a9153bc37 ]
Instead of using state->fb->obj[0] directly, get object from framebuffer
by calling drm_gem_fb_get_obj() and return error code when object is
null to avoid using null object of framebuffer.
Fixes: 5d945cbcd4b1 ("drm/amd/display: Create a file dedicated to planes")
Signed-off-by: Ma Ke <make24@xxxxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
(cherry picked from commit 73dd0ad9e5dad53766ea3e631303430116f834b3)
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
index cc74dd69acf2b..fa9f53b310793 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
@@ -28,6 +28,7 @@
#include <drm/drm_blend.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_plane_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_fourcc.h>
#include "amdgpu.h"
@@ -848,10 +849,14 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
}
afb = to_amdgpu_framebuffer(new_state->fb);
- obj = new_state->fb->obj[0];
+ obj = drm_gem_fb_get_obj(new_state->fb, 0);
+ if (!obj) {
+ DRM_ERROR("Failed to get obj from framebuffer\n");
+ return -EINVAL;
+ }
+
rbo = gem_to_amdgpu_bo(obj);
adev = amdgpu_ttm_adev(rbo->tbo.bdev);
-
r = amdgpu_bo_reserve(rbo, true);
if (r) {
dev_err(adev->dev, "fail to reserve bo (%d)\n", r);
--
2.43.0
