[PATCH] drm/amd/display: fix NULL pointer dereference.

[Quan, Evan]

The issue seems already fixed by the following commit
{{{
commit 52184bbf4773512d7c83fe21a0b4b4ec4be27caf
Author: Jordan Lazare <Jordan.Lazare at amd.com>
Date:   Wed Apr 5 15:05:51 2017 -0400

    drm/amd/display: fix nullptr on vega initialization

    Change-Id: Ic5062d9b9e7ad3406c8ed0acfe0e2f222ce17634
    Signed-off-by: Jordan Lazare <Jordan.Lazare at amd.com>
    Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
    Reviewed-by: Roman Li <Roman.Li at amd.com>
}}}

Regards,
Evan
>-----Original Message-----
>From: amd-gfx [mailto:amd-gfx-bounces at lists.freedesktop.org] On Behalf Of
>Rex Zhu
>Sent: Wednesday, April 05, 2017 3:55 PM
>To: amd-gfx at lists.freedesktop.org
>Cc: Zhu, Rex <Rex.Zhu at amd.com>
>Subject: [PATCH] drm/amd/display: fix NULL pointer dereference.
>
>on vega10, driver can run into a NULL-pointer dereference.
>
>Change-Id: I8e2de5343f804d6e736f620ff6d3d6e6488fb970
>Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
>---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>index 62be159..8f5951f 100644
>--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
>@@ -1095,7 +1095,8 @@ int amdgpu_dm_initialize_drm_device(struct
>amdgpu_device *adev)
> 			DRM_ERROR("KMS: Failed to allocate surface\n");
> 			goto fail_free_planes;
> 		}
>-		mode_info->planes[i]->plane_type = mode_info-
>>plane_type[i];
>+		if (mode_info->plane_type != NULL)
>+			mode_info->planes[i]->plane_type = mode_info-
>>plane_type[i];
> 		if (amdgpu_dm_plane_init(dm, mode_info->planes[i], 1)) {
> 			DRM_ERROR("KMS: Failed to initialize plane\n");
> 			goto fail_free_planes;
>--
>1.9.1
>
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