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nvmet: use strcmp() instead of strncmp() for subsystem lookup

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strncmp() stops comparing when either the end of one of the first two arguments
is reached or when 'n' characters have been compared, whichever comes first.
That means that strncmp(s1, s2, n) is equivalent to strcmp(s1, s2) if n exceeds
the length of s1 or the length of s2. Since that is the case in
nvmet_find_get_subsys(), change strncmp() into strcmp(). This patch avoids that
the following warning is reported by smatch:

drivers/nvme/target/core.c:940:1 nvmet_find_get_subsys() error: strncmp() '"nqn.2014-08.org.nvmexpress.discovery"' too small (37 vs 223)

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Bart Van Assche 2018-10-08 14:28:49 -07:00 committed by Christoph Hellwig
parent 48440ab6dc
commit 43a6f8fb61
1 changed files with 1 additions and 2 deletions
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drivers/nvme/target/core.c
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@ -1105,8 +1105,7 @@ static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port,
if (!port)
return NULL;
if (!strncmp(NVME_DISC_SUBSYS_NAME, subsysnqn,
NVMF_NQN_SIZE)) {
if (!strcmp(NVME_DISC_SUBSYS_NAME, subsysnqn)) {
if (!kref_get_unless_zero(&nvmet_disc_subsys->ref))
return NULL;
return nvmet_disc_subsys;