linux-kernel - [PATCH -next] nvmet: fix return value check in nvmet_subsys

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Date:	Wed,  6 Jul 2016 12:02:09 +0000
From:	weiyj_lk@....com
To:	Christoph Hellwig <hch@....de>, Sagi Grimberg <sagi@...mberg.me>
Cc:	Wei Yongjun <yongjun_wei@...ndmicro.com.cn>,
	linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH -next] nvmet: fix return value check in nvmet_subsys_alloc()

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

In case of error, the function kstrndup() returns NULL pointer
not ERR_PTR(). The IS_ERR() test in the return value check
should be replaced with NULL test.

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 drivers/nvme/target/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index e0b3f01..8a891ca 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -895,7 +895,7 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn,
 	subsys->type = type;
 	subsys->subsysnqn = kstrndup(subsysnqn, NVMF_NQN_SIZE,
 			GFP_KERNEL);
-	if (IS_ERR(subsys->subsysnqn)) {
+	if (!subsys->subsysnqn) {
 		kfree(subsys);
 		return NULL;
 	}