nvme: fix NULL pointer dereference in nvme_init_subsystem

When using nvme-pci driver the nvmf_ctrl_options is NULL.
There is no need to check for discovery_nqn flag at non-fabrics controller.

Fixes: 181303d0 ("nvme-fabrics: allow duplicate connections to the discovery controller")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index e2dcd14012b1..d6ca4598c027 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2208,7 +2208,7 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id)
                  * Verify that the subsystem actually supports multiple
                  * controllers, else bail out.
                  */
-                if (!ctrl->opts->discovery_nqn &&
+                if (!(ctrl->opts && ctrl->opts->discovery_nqn) &&
                     nvme_active_ctrls(found) && !(id->cmic & (1 << 1))) {
                         dev_err(ctrl->device,
                                 "ignoring ctrl due to duplicate subnqn (%s).\n",