drm/amdgpu: fix zeroing all IB fields manually v2

The problem now is that we don't necessarily call amdgpu_ib_get()
in some error paths and so work with uninitialized data.

Better require that the memory is already zeroed.

v2: better commit message

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com> (v1)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 2cf7f52..a592df5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -260,7 +260,7 @@ int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data)
        }
 
 
-       p->ibs = kmalloc_array(p->num_ibs, sizeof(struct amdgpu_ib), GFP_KERNEL);
+       p->ibs = kcalloc(p->num_ibs, sizeof(struct amdgpu_ib), GFP_KERNEL);
        if (!p->ibs)
                r = -ENOMEM;
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 5104e64..1c237f5 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -73,29 +73,12 @@ int amdgpu_ib_get(struct amdgpu_ring *ring, struct amdgpu_vm *vm,
 
                if (!vm)
                        ib->gpu_addr = amdgpu_sa_bo_gpu_addr(ib->sa_bo);
-               else
-                       ib->gpu_addr = 0;
-
-       } else {
-               ib->sa_bo = NULL;
-               ib->ptr = NULL;
-               ib->gpu_addr = 0;
        }
 
        amdgpu_sync_create(&ib->sync);
 
        ib->ring = ring;
-       ib->fence = NULL;
-       ib->user = NULL;
        ib->vm = vm;
-       ib->ctx = NULL;
-       ib->gds_base = 0;
-       ib->gds_size = 0;
-       ib->gws_base = 0;
-       ib->gws_size = 0;
-       ib->oa_base = 0;
-       ib->oa_size = 0;
-       ib->flags = 0;
 
        return 0;
 }

diff --git a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
index 2b4242b..af52655 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik_sdma.c
@@ -630,6 +630,7 @@ static int cik_sdma_ring_test_ib(struct amdgpu_ring *ring)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        tmp = 0xCAFEDEAD;
        adev->wb.wb[index] = cpu_to_le32(tmp);
+       memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(ring, NULL, 256, &ib);
        if (r) {
                DRM_ERROR("amdgpu: failed to get ib (%d).\n", r);

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
index 9b0cab4..fab7b23 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v7_0.c
@@ -2660,6 +2660,7 @@ static int gfx_v7_0_ring_test_ib(struct amdgpu_ring *ring)
                return r;
        }
        WREG32(scratch, 0xCAFEDEAD);
+       memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(ring, NULL, 256, &ib);
        if (r) {
                DRM_ERROR("amdgpu: failed to get ib (%d).\n", r);

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 4b68e63..818edb3 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -622,6 +622,7 @@ static int gfx_v8_0_ring_test_ib(struct amdgpu_ring *ring)
                return r;
        }
        WREG32(scratch, 0xCAFEDEAD);
+       memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(ring, NULL, 256, &ib);
        if (r) {
                DRM_ERROR("amdgpu: failed to get ib (%d).\n", r);

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
index 9de8104..2b0e89e 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c
@@ -689,6 +689,7 @@ static int sdma_v2_4_ring_test_ib(struct amdgpu_ring *ring)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        tmp = 0xCAFEDEAD;
        adev->wb.wb[index] = cpu_to_le32(tmp);
+       memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(ring, NULL, 256, &ib);
        if (r) {
                DRM_ERROR("amdgpu: failed to get ib (%d).\n", r);

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
index 029f345..6f1df03 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c
@@ -810,6 +810,7 @@ static int sdma_v3_0_ring_test_ib(struct amdgpu_ring *ring)
        gpu_addr = adev->wb.gpu_addr + (index * 4);
        tmp = 0xCAFEDEAD;
        adev->wb.wb[index] = cpu_to_le32(tmp);
+       memset(&ib, 0, sizeof(ib));
        r = amdgpu_ib_get(ring, NULL, 256, &ib);
        if (r) {
                DRM_ERROR("amdgpu: failed to get ib (%d).\n", r);