gpu: nvgpu: Return error code on zero IOVA

When buffer's IOVA is zero, treat that as error condition instead of
ignoring and continuing.

Change-Id: I2ede9921945645f526b0600f61f7e5ed19af6d73
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: http://git-master/r/1249963
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Seema Khowala <seemaj@nvidia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
index 8b3d0dfa..6b8af929 100644
--- a/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
+++ b/drivers/gpu/nvgpu/gk20a/cde_gk20a.c
@@ -399,7 +399,7 @@ static int gk20a_cde_patch_params(struct gk20a_cde_ctx *cde_ctx)
                         new_data = gk20a_mm_gpuva_to_iova_base(cde_ctx->vm,
                                                         cde_ctx->surf_vaddr);
                         if (new_data == 0)
-                                err = -EINVAL;
+                                return -EINVAL;
                         break;
                 case TYPE_PARAM_BACKINGSTORE_BASE_HW:
                         new_data = g->gr.compbit_store.base_hw;