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bcache: Remove unnecessary NULL point check in node allocations

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Due to the previous fix of __bch_btree_node_alloc, the return value will
never be a NULL pointer. So IS_ERR is enough to handle the failure
situation. Fix it by replacing IS_ERR_OR_NULL check by an IS_ERR check.

Fixes: cafe563591 ("bcache: A block layer cache")
Cc: stable@vger.kernel.org
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Signed-off-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20230615121223.22502-5-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Zheng Wang
2023-06-15 20:12:21 +08:00
committed by Jens Axboe
parent ccb8c3bd6d
commit 028ddcac47
2 changed files with 7 additions and 7 deletions
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4
drivers/md/bcache/super.c
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@@ -1723,7 +1723,7 @@ static void cache_set_flush(struct closure *cl)
if (!IS_ERR_OR_NULL(c->gc_thread))
kthread_stop(c->gc_thread);
if (!IS_ERR_OR_NULL(c->root))
if (!IS_ERR(c->root))
list_add(&c->root->list, &c->btree_cache);
/*
@@ -2087,7 +2087,7 @@ static int run_cache_set(struct cache_set *c)
err = "cannot allocate new btree root";
c->root = __bch_btree_node_alloc(c, NULL, 0, true, NULL);
if (IS_ERR_OR_NULL(c->root))
if (IS_ERR(c->root))
goto err;
mutex_lock(&c->root->write_lock);