nvmet: fix return value check in nvmet_subsys_alloc()

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@trendmicro.com.cn>
Reviewed-by: Jay Freyensee <james_p_freyensee@linux.intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index e0b3f0166722..8a891ca53367 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;
         }