From: Ross Lagerwall <ross.lagerwall@citrix.com>
Date: Fri, 20 Jan 2023 17:43:54 +0000 (+0000)
Subject: nvme-fc: fix initialization order
X-Git-Tag: v6.1.9~55
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=048c82c0b3bd1372f4020d29414b848b17d01839;p=platform%2Fkernel%2Flinux-starfive.git

nvme-fc: fix initialization order

[ Upstream commit 98e3528012cd571c48bbae7c7c0f868823254b6c ]

ctrl->ops is used by nvme_alloc_admin_tag_set() but set by
nvme_init_ctrl() so reorder the calls to avoid a NULL pointer
dereference.

Fixes: 6dfba1c09c10 ("nvme-fc: use the tagset alloc/free helpers")
Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 5f07a6b..6c3d469 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -3508,13 +3508,6 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	nvme_fc_init_queue(ctrl, 0);
 
-	ret = nvme_alloc_admin_tag_set(&ctrl->ctrl, &ctrl->admin_tag_set,
-			&nvme_fc_admin_mq_ops,
-			struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv,
-				    ctrl->lport->ops->fcprqst_priv_sz));
-	if (ret)
-		goto out_free_queues;
-
 	/*
 	 * Would have been nice to init io queues tag set as well.
 	 * However, we require interaction from the controller
@@ -3524,10 +3517,17 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts,
 
 	ret = nvme_init_ctrl(&ctrl->ctrl, dev, &nvme_fc_ctrl_ops, 0);
 	if (ret)
-		goto out_cleanup_tagset;
+		goto out_free_queues;
 
 	/* at this point, teardown path changes to ref counting on nvme ctrl */
 
+	ret = nvme_alloc_admin_tag_set(&ctrl->ctrl, &ctrl->admin_tag_set,
+			&nvme_fc_admin_mq_ops,
+			struct_size((struct nvme_fcp_op_w_sgl *)NULL, priv,
+				    ctrl->lport->ops->fcprqst_priv_sz));
+	if (ret)
+		goto fail_ctrl;
+
 	spin_lock_irqsave(&rport->lock, flags);
 	list_add_tail(&ctrl->ctrl_list, &rport->ctrl_list);
 	spin_unlock_irqrestore(&rport->lock, flags);
@@ -3579,8 +3579,6 @@ fail_ctrl:
 
 	return ERR_PTR(-EIO);
 
-out_cleanup_tagset:
-	nvme_remove_admin_tag_set(&ctrl->ctrl);
 out_free_queues:
 	kfree(ctrl->queues);
 out_free_ida: