commit 01ffcb46259205fe4a9b49aecc8888253dfbf7a2

Author: Tomas Bzatek <tbzatek@redhat.com>

Date:   Wed Mar 23 13:17:02 2022 +0100

    tree: Handle NULL subsysname in nvme_scan_ctrl()

    As noted couple of lines earlier, the subsysname string might

    be NULL. In that case, defer initialization of nvme_subsystem_t

    in hope that it would get initialized while scanning subsystems.

diff --git a/src/nvme/tree.c b/src/nvme/tree.c

index 0764690..5042a8e 100644

--- a/src/nvme/tree.c

+++ b/src/nvme/tree.c

@@ -1367,7 +1367,7 @@ nvme_ctrl_t nvme_scan_ctrl(nvme_root_t r, const char *name)

 	free(subsysnqn);

 	ret = 0;

-	if (s && !s->name)

+	if (s && !s->name && subsysname)

 		ret = nvme_init_subsystem(s, subsysname);

 	free(subsysname);

 	if (!s || ret < 0) {