Hi John, url: https://github.com/0day-ci/linux/commits/John-Stultz/dma-buf-Performance-improvements-for-system-heap-a-system-uncached-implementation/20201003-120520 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git bcf876870b95592b52519ed4aafcf9d95999bc9c config: i386-randconfig-m021-20201002 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot Reported-by: Dan Carpenter smatch warnings: drivers/dma-buf/heaps/system_heap.c:496 system_heap_create() warn: passing zero to 'PTR_ERR' vim +/PTR_ERR +496 drivers/dma-buf/heaps/system_heap.c efa04fefebbd724 John Stultz 2019-12-03 478 static int system_heap_create(void) efa04fefebbd724 John Stultz 2019-12-03 479 { efa04fefebbd724 John Stultz 2019-12-03 480 struct dma_heap_export_info exp_info; efa04fefebbd724 John Stultz 2019-12-03 481 263e38f82cbb35b Andrew F. Davis 2019-12-16 482 exp_info.name = "system"; efa04fefebbd724 John Stultz 2019-12-03 483 exp_info.ops = &system_heap_ops; efa04fefebbd724 John Stultz 2019-12-03 484 exp_info.priv = NULL; efa04fefebbd724 John Stultz 2019-12-03 485 efa04fefebbd724 John Stultz 2019-12-03 486 sys_heap = dma_heap_add(&exp_info); efa04fefebbd724 John Stultz 2019-12-03 487 if (IS_ERR(sys_heap)) a2e10cdd2e4d12a John Stultz 2020-10-03 488 return PTR_ERR(sys_heap); efa04fefebbd724 John Stultz 2019-12-03 489 553f4e0fafc5b3b John Stultz 2020-10-03 490 exp_info.name = "system-uncached"; 553f4e0fafc5b3b John Stultz 2020-10-03 491 exp_info.ops = &system_uncached_heap_ops; 553f4e0fafc5b3b John Stultz 2020-10-03 492 exp_info.priv = NULL; 553f4e0fafc5b3b John Stultz 2020-10-03 493 553f4e0fafc5b3b John Stultz 2020-10-03 494 sys_uncached_heap = dma_heap_add(&exp_info); 553f4e0fafc5b3b John Stultz 2020-10-03 495 if (IS_ERR(sys_uncached_heap)) 553f4e0fafc5b3b John Stultz 2020-10-03 @496 return PTR_ERR(sys_heap); ^^^^^^^^^^^^^^^^^ This should be return PTR_ERR(sys_uncached_heap); --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org