tree: do no free ns on error in nvme_ns_init

The ns pointer is owned by the caller not by nvme_ns_init, thus we can't
just free it on error.

Fixes: 7959f52 ("tree: read all attributes from sysfs when available")
Reported-by: Tomasz Kłoczko <[email protected]>
Signed-off-by: Daniel Wagner <[email protected]>

src/nvme/tree.c

@@ -2473,7 +2473,7 @@ static int nvme_ns_init(const char *path, struct nvme_ns *ns)
 
 		ret = nvme_ns_identify(ns, id);
 		if (ret)
-			free(ns);
+			return ret;
 
 		nvme_id_ns_flbas_to_lbaf_inuse(id->flbas, &flbas);
 		ns->lba_count = le64_to_cpu(id->nsze);