From: Dan Carpenter dan.carpenter@oracle.com
mainline inclusion from mainline-v5.14-rc1 commit 52d7e288444906aa5c99888e80a9cc1a1423ed92 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I81XCK
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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The __blk_mq_alloc_disk() function doesn't return NULLs it returns error pointers.
Fixes: b461dfc49eb6 ("blk-mq: add the blk_mq_alloc_disk APIs") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Christoph Hellwig hch@lst.de Link: https://lore.kernel.org/r/YMyjci35WBqrtqG+@mwanda Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Zhong Jinghua zhongjinghua@huawei.com Signed-off-by: Li Nan linan122@huawei.com --- include/linux/blk-mq.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 74a57d8aa76d..289ec99e376a 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -469,7 +469,7 @@ enum { static struct lock_class_key __key; \ struct gendisk *__disk = __blk_mq_alloc_disk(set, queuedata); \ \ - if (__disk) \ + if (!IS_ERR(__disk)) \ lockdep_init_map(&__disk->lockdep_map, \ "(bio completion)", &__key, 0); \ __disk; \