v3d: Fix segfault when failing to compile a program.

We'll still fail at draw time, but this avoids a regression in shader-db
execution once I enable TLB writes in precompiles.

Fixes: b38e4d313fc2 ("v3d: Create a state uploader for packing our shaders together.")

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gallium/drivers/v3d/v3d_program.c b/src/gallium/drivers/v3d/v3d_program.c
index 759fac117f2..ef80069baab 100644
--- a/src/gallium/drivers/v3d/v3d_program.c
+++ b/src/gallium/drivers/v3d/v3d_program.c
@@ -373,8 +373,10 @@ v3d_get_compiled_shader(struct v3d_context *v3d, struct v3d_key *key)
 
         v3d_set_shader_uniform_dirty_flags(shader);
 
-        u_upload_data(v3d->state_uploader, 0, shader_size, 8,
-                      qpu_insts, &shader->offset, &shader->resource);
+        if (shader_size) {
+                u_upload_data(v3d->state_uploader, 0, shader_size, 8,
+                              qpu_insts, &shader->offset, &shader->resource);
+        }
 
         free(qpu_insts);