Hello Ben Goz,
The patch 241f24f82363: "amdkfd: Add packet manager module" from Jul 17, 2014, leads to the following static checker warning:
drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c:357 pm_send_set_resources() error: potentially using uninitialized 'packet'.
drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c 344 int pm_send_set_resources(struct packet_manager *pm, 345 struct scheduling_resources *res) 346 { 347 struct pm4_set_resources *packet; 348 349 BUG_ON(!pm || !res); 350 351 pr_debug("kfd: In func %s\n", __func__); 352 353 mutex_lock(&pm->lock); 354 pm->priv_queue->acquire_packet_buffer(pm->priv_queue, 355 sizeof(*packet) / sizeof(uint32_t), 356 (unsigned int **)&packet);
If we added error handling to ->acquire_packet_buffer() or if that function set packet to NULL on error, either one of those would silence this static checker warning (from pre-release Smatch checks).
357 if (packet == NULL) { 358 mutex_unlock(&pm->lock); 359 pr_err("kfd: failed to allocate buffer on kernel queue\n"); 360 return -ENOMEM; 361 } 362
regards, dan carpenter