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drm/amd/display: avoid using null object of framebuffer 

[ 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: 5d945cbcd4 ("drm/amd/display: Create a file dedicated to planes")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 73dd0ad9e5dad53766ea3e631303430116f834b3)
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ma Ke 2024-08-21 12:27:24 +08:00 committed by Greg Kroah-Hartman
parent b65116bee7
commit f6f5e39a3f
1 changed files with 7 additions and 2 deletions
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9
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c
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@ -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);