NVMe: Fix error handling of class_create("nvme")
class_create() returns ERR_PTR on failure,
so IS_ERR() should be used instead of check for NULL.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index ef43278..9052553 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -3163,8 +3163,10 @@
nvme_char_major = result;
nvme_class = class_create(THIS_MODULE, "nvme");
- if (!nvme_class)
+ if (IS_ERR(nvme_class)) {
+ result = PTR_ERR(nvme_class);
goto unregister_chrdev;
+ }
result = pci_register_driver(&nvme_driver);
if (result)