[PATCH] drm/amdgpu: fix memory overflow in the IB test

[Tim Huang]

Fix a memory overflow issue in the gfx IB test
for some ASICs. At least 20 bytes are needed for
the IB test packet.

Signed-off-by: Tim Huang <tim.hu...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c  | 2 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c   | 2 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c   | 2 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
index 0c6133cc5e57..f281eecaeeec 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v11_0.c
@@ -419,7 +419,7 @@ static int gfx_v11_0_ring_test_ib(struct amdgpu_ring *ring, 
long timeout)
                adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
                cpu_ptr = &adev->wb.wb[index];
 
-               r = amdgpu_ib_get(adev, NULL, 16, AMDGPU_IB_POOL_DIRECT, &ib);
+               r = amdgpu_ib_get(adev, NULL, 20, AMDGPU_IB_POOL_DIRECT, &ib);
                if (r) {
                        DRM_ERROR("amdgpu: failed to get ib (%ld).\n", r);
                        goto err1;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 885ebd703260..4b0eda46405f 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -883,7 +883,7 @@ static int gfx_v8_0_ring_test_ib(struct amdgpu_ring *ring, 
long timeout)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
        memset(&ib, 0, sizeof(ib));
-       r = amdgpu_ib_get(adev, NULL, 16,
+       r = amdgpu_ib_get(adev, NULL, 20,
                                        AMDGPU_IB_POOL_DIRECT, &ib);
        if (r)
                goto err1;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index e3ff6e46f3f7..a55710bf6e01 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -1039,7 +1039,7 @@ static int gfx_v9_0_ring_test_ib(struct amdgpu_ring 
*ring, long timeout)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
        memset(&ib, 0, sizeof(ib));
-       r = amdgpu_ib_get(adev, NULL, 16,
+       r = amdgpu_ib_get(adev, NULL, 20,
                                        AMDGPU_IB_POOL_DIRECT, &ib);
        if (r)
                goto err1;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c 
b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
index 40d06d32bb74..603988e49cd5 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_4_3.c
@@ -297,7 +297,7 @@ static int gfx_v9_4_3_ring_test_ib(struct amdgpu_ring 
*ring, long timeout)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        adev->wb.wb[index] = cpu_to_le32(0xCAFEDEAD);
        memset(&ib, 0, sizeof(ib));
-       r = amdgpu_ib_get(adev, NULL, 16,
+       r = amdgpu_ib_get(adev, NULL, 20,
                          AMDGPU_IB_POOL_DIRECT, &ib);
        if (r)
                goto err1;
-- 
2.39.2