tree: Ignore NULL address pointer for phy slot lookup

The PCI physical slot lookup works obviously only for physical cards.
Thus do not try to dereference the address pointer if it is a NULL
pointer.

Fixes: 42ac45359635 ("tree: Add PCI physical slot number for controller")
Signed-off-by: Daniel Wagner <dwagner@suse.de>

diff --git a/src/nvme/tree.c b/src/nvme/tree.c
index 4ba39832fbc39329fe3cc13333d7773697816a12..a2ac0698e59ac8eeb042b5f8e0a93f007b901c42 100644 (file)
--- a/src/nvme/tree.c
+++ b/src/nvme/tree.c
@@ -1274,6 +1274,9 @@ static char *nvme_ctrl_lookup_phy_slot(nvme_root_t r, const char *address)
        DIR *slots_dir;
        struct dirent *entry;
 
+       if (!address)
+               return NULL;
+
        slots_dir = opendir(nvme_slots_sysfs_dir);
        if (!slots_dir) {
                nvme_msg(r, LOG_WARNING, "failed to open slots dir %s\n",