[PATCH 6/6] nvme: display correct subsystem NQN

[Hannes Reinecke]

With discovery controllers supporting unique subsystem NQNs the
actual subsystem NQN might be different from that one passed in
via the connect args. So add a helper to display the resulting
subsystem NQN.

Signed-off-by: Hannes Reinecke <hare at suse.de>
---
 drivers/nvme/host/core.c    | 2 +-
 drivers/nvme/host/fabrics.h | 5 +++++
 drivers/nvme/host/fc.c      | 2 +-
 drivers/nvme/host/rdma.c    | 2 +-
 drivers/nvme/host/tcp.c     | 2 +-
 5 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index cc4e97dab3f0..e17ef2c43973 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -220,7 +220,7 @@ int nvme_reset_ctrl_sync(struct nvme_ctrl *ctrl)
 static void nvme_do_delete_ctrl(struct nvme_ctrl *ctrl)
 {
 	dev_info(ctrl->device,
-		 "Removing ctrl: NQN \"%s\"\n", ctrl->opts->subsysnqn);
+		 "Removing ctrl: NQN \"%s\"\n", nvmf_ctrl_subsysnqn(ctrl));
 
 	flush_work(&ctrl->reset_work);
 	nvme_stop_ctrl(ctrl);
diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index b61b666e10ec..56253a060258 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -179,6 +179,11 @@ nvmf_ctlr_matches_baseopts(struct nvme_ctrl *ctrl,
 	return true;
 }
 
+static inline char *nvmf_ctrl_subsysnqn(struct nvme_ctrl *ctrl)
+{
+	return ctrl->subsys ? ctrl->subsys->subnqn : ctrl->opts->subsysnqn;
+}
+
 int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val);
 int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val);
 int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val);
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 7f462af1b02a..c4a08c555aae 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -3572,7 +3572,7 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	dev_info(ctrl->ctrl.device,
 		"NVME-FC{%d}: new ctrl: NQN \"%s\"\n",
-		ctrl->cnum, ctrl->ctrl.opts->subsysnqn);
+		ctrl->cnum, nvmf_ctrl_subsysnqn(&ctrl->ctrl));
 
 	return &ctrl->ctrl;
 
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 69ae67652f38..5edeb019408f 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -2395,7 +2395,7 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
 		goto out_uninit_ctrl;
 
 	dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISpcs\n",
-		ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
+		nvmf_ctrl_subsysnqn(&ctrl->ctrl), &ctrl->addr);
 
 	mutex_lock(&nvme_rdma_ctrl_mutex);
 	list_add_tail(&ctrl->list, &nvme_rdma_ctrl_list);
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 0a97ba02f61e..6410a96b87a6 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -2559,7 +2559,7 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,
 		goto out_uninit_ctrl;
 
 	dev_info(ctrl->ctrl.device, "new ctrl: NQN \"%s\", addr %pISp\n",
-		ctrl->ctrl.opts->subsysnqn, &ctrl->addr);
+		nvmf_ctrl_subsysnqn(&ctrl->ctrl), &ctrl->addr);
 
 	mutex_lock(&nvme_tcp_ctrl_mutex);
 	list_add_tail(&ctrl->list, &nvme_tcp_ctrl_list);
-- 
2.29.2