tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: cb153b68ff91cbc434f3de70ac549e110543e1bb commit: 6fadb021266d03c5fd7bca2cfa1607efd246dad1 [9639/11353] vfio/mlx5: Implement vfio_pci driver for mlx5 devices config: alpha-allmodconfig (https://download.01.org/0day-ci/archive/20220309/202203090703.kxvZumJg-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6fadb021266d03c5fd7bca2cfa1607efd246dad1 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 6fadb021266d03c5fd7bca2cfa1607efd246dad1 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=alpha SHELL=/bin/bash drivers/vfio/pci/mlx5/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/vfio/pci/mlx5/main.c:409:24: sparse: sparse: Using plain integer as NULL pointer drivers/vfio/pci/mlx5/main.c:430:24: sparse: sparse: Using plain integer as NULL pointer vim +409 drivers/vfio/pci/mlx5/main.c 352 353 static struct file * 354 mlx5vf_pci_step_device_state_locked(struct mlx5vf_pci_core_device *mvdev, 355 u32 new) 356 { 357 u32 cur = mvdev->mig_state; 358 int ret; 359 360 if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_STOP) { 361 ret = mlx5vf_cmd_suspend_vhca( 362 mvdev->core_device.pdev, mvdev->vhca_id, 363 MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_RESPONDER); 364 if (ret) 365 return ERR_PTR(ret); 366 return NULL; 367 } 368 369 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RUNNING_P2P) { 370 ret = mlx5vf_cmd_resume_vhca( 371 mvdev->core_device.pdev, mvdev->vhca_id, 372 MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_RESPONDER); 373 if (ret) 374 return ERR_PTR(ret); 375 return NULL; 376 } 377 378 if (cur == VFIO_DEVICE_STATE_RUNNING && new == VFIO_DEVICE_STATE_RUNNING_P2P) { 379 ret = mlx5vf_cmd_suspend_vhca( 380 mvdev->core_device.pdev, mvdev->vhca_id, 381 MLX5_SUSPEND_VHCA_IN_OP_MOD_SUSPEND_INITIATOR); 382 if (ret) 383 return ERR_PTR(ret); 384 return NULL; 385 } 386 387 if (cur == VFIO_DEVICE_STATE_RUNNING_P2P && new == VFIO_DEVICE_STATE_RUNNING) { 388 ret = mlx5vf_cmd_resume_vhca( 389 mvdev->core_device.pdev, mvdev->vhca_id, 390 MLX5_RESUME_VHCA_IN_OP_MOD_RESUME_INITIATOR); 391 if (ret) 392 return ERR_PTR(ret); 393 return NULL; 394 } 395 396 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_STOP_COPY) { 397 struct mlx5_vf_migration_file *migf; 398 399 migf = mlx5vf_pci_save_device_data(mvdev); 400 if (IS_ERR(migf)) 401 return ERR_CAST(migf); 402 get_file(migf->filp); 403 mvdev->saving_migf = migf; 404 return migf->filp; 405 } 406 407 if ((cur == VFIO_DEVICE_STATE_STOP_COPY && new == VFIO_DEVICE_STATE_STOP)) { 408 mlx5vf_disable_fds(mvdev); > 409 return 0; 410 } 411 412 if (cur == VFIO_DEVICE_STATE_STOP && new == VFIO_DEVICE_STATE_RESUMING) { 413 struct mlx5_vf_migration_file *migf; 414 415 migf = mlx5vf_pci_resume_device_data(mvdev); 416 if (IS_ERR(migf)) 417 return ERR_CAST(migf); 418 get_file(migf->filp); 419 mvdev->resuming_migf = migf; 420 return migf->filp; 421 } 422 423 if (cur == VFIO_DEVICE_STATE_RESUMING && new == VFIO_DEVICE_STATE_STOP) { 424 ret = mlx5vf_cmd_load_vhca_state(mvdev->core_device.pdev, 425 mvdev->vhca_id, 426 mvdev->resuming_migf); 427 if (ret) 428 return ERR_PTR(ret); 429 mlx5vf_disable_fds(mvdev); 430 return 0; 431 } 432 433 /* 434 * vfio_mig_get_next_state() does not use arcs other than the above 435 */ 436 WARN_ON(true); 437 return ERR_PTR(-EINVAL); 438 } 439 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
