Patch "drm/amdgpu: fix the memory corruption on S3" has been added to the 4.12-stable tree

Patch "drm/amdgpu: fix the memory corruption on S3" has been added to the 4.12-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/amdgpu: fix the memory corruption on S3

to the 4.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amdgpu-fix-the-memory-corruption-on-s3.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 67bef0f7908a3a6b10e5a29d8e8c09e27f90c9f8 Mon Sep 17 00:00:00 2001
From: Huang Rui <ray.huang@amd.com>
Date: Thu, 29 Jun 2017 14:21:49 +0800
Subject: drm/amdgpu: fix the memory corruption on S3
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Huang Rui <ray.huang@amd.com>

commit 67bef0f7908a3a6b10e5a29d8e8c09e27f90c9f8 upstream.

psp->cmd will be used on resume phase, so we can not free it on hw_init.
Otherwise, a memory corruption will be triggered.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Tested-by: Xiaojie Yuan <Xiaojie.Yuan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c |   15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -319,14 +319,11 @@ static int psp_load_fw(struct amdgpu_dev
 {
 	int ret;
 	struct psp_context *psp = &adev->psp;
-	struct psp_gfx_cmd_resp *cmd;
 
-	cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
-	if (!cmd)
+	psp->cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
+	if (!psp->cmd)
 		return -ENOMEM;
 
-	psp->cmd = cmd;
-
 	ret = amdgpu_bo_create_kernel(adev, PSP_1_MEG, PSP_1_MEG,
 				      AMDGPU_GEM_DOMAIN_GTT,
 				      &psp->fw_pri_bo,
@@ -365,8 +362,6 @@ static int psp_load_fw(struct amdgpu_dev
 	if (ret)
 		goto failed_mem;
 
-	kfree(cmd);
-
 	return 0;
 
 failed_mem:
@@ -376,7 +371,8 @@ failed_mem1:
 	amdgpu_bo_free_kernel(&psp->fw_pri_bo,
 			      &psp->fw_pri_mc_addr, &psp->fw_pri_buf);
 failed:
-	kfree(cmd);
+	kfree(psp->cmd);
+	psp->cmd = NULL;
 	return ret;
 }
 
@@ -436,6 +432,9 @@ static int psp_hw_fini(void *handle)
 		amdgpu_bo_free_kernel(&psp->fence_buf_bo,
 				      &psp->fence_buf_mc_addr, &psp->fence_buf);
 
+	kfree(psp->cmd);
+	psp->cmd = NULL;
+
 	return 0;
 }
 


Patches currently in stable-queue which might be from ray.huang@amd.com are

queue-4.12/drm-amdgpu-fix-the-memory-corruption-on-s3.patch