diff options
| author | Christian König <christian.koenig@amd.com> | 2016-01-31 11:32:04 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-02-10 14:17:18 -0500 |
| commit | 4acabfe3793eb9bf89f71cc0cef23dfb2a812916 (patch) | |
| tree | 6f7264b6be02983e133060311790a54db7ce3fbd /drivers/gpu/drm | |
| parent | 867d0517c705d9ae5a21f566ffe2308f5c070c6c (diff) | |
| download | linux-4acabfe3793eb9bf89f71cc0cef23dfb2a812916.tar.bz2 | |
drm/amdgpu: fix num_ibs check
Specifying no IBs on command submission is invalid, stop crashing
badly when somebody tries it.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucer@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index e7e384264202..55179efccfcf 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -211,6 +211,10 @@ int amdgpu_cs_parser_init(struct amdgpu_cs_parser *p, void *data) } } + if (p->num_ibs == 0) { + ret = -EINVAL; + goto free_all_kdata; + } p->ibs = kcalloc(p->num_ibs, sizeof(struct amdgpu_ib), GFP_KERNEL); if (!p->ibs) { @@ -551,9 +555,6 @@ static int amdgpu_cs_ib_vm_chunk(struct amdgpu_device *adev, struct amdgpu_ring *ring; int i, r; - if (parser->num_ibs == 0) - return 0; - /* Only for UVD/VCE VM emulation */ for (i = 0; i < parser->num_ibs; i++) { ring = parser->ibs[i].ring; @@ -660,9 +661,6 @@ static int amdgpu_cs_ib_fill(struct amdgpu_device *adev, j++; } - if (!parser->num_ibs) - return 0; - /* add GDS resources to first IB */ if (parser->bo_list) { struct amdgpu_bo *gds = parser->bo_list->gds_obj; @@ -705,9 +703,6 @@ static int amdgpu_cs_dependencies(struct amdgpu_device *adev, struct amdgpu_ib *ib; int i, j, r; - if (!p->num_ibs) - return 0; - /* Add dependencies to first IB */ ib = &p->ibs[0]; for (i = 0; i < p->nchunks; ++i) { @@ -866,8 +861,7 @@ int amdgpu_cs_ioctl(struct drm_device *dev, void *data, struct drm_file *filp) if (r) goto out; - if (parser.num_ibs) - r = amdgpu_cs_submit(&parser, cs); + r = amdgpu_cs_submit(&parser, cs); out: amdgpu_cs_parser_fini(&parser, r, reserved_buffers); |