linux-kernel - [PATCH AUTOSEL 6.7 37/44] nvmet-fc: do not tack refs on tgtports from assoc

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Message-ID: <20240207212142.1399-37-sashal@kernel.org>
Date: Wed,  7 Feb 2024 16:21:04 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Daniel Wagner <dwagner@...e.de>,
	Hannes Reinecke <hare@...e.de>,
	Christoph Hellwig <hch@....de>,
	Keith Busch <kbusch@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	james.smart@...adcom.com,
	sagi@...mberg.me,
	kch@...dia.com,
	linux-nvme@...ts.infradead.org
Subject: [PATCH AUTOSEL 6.7 37/44] nvmet-fc: do not tack refs on tgtports from assoc

From: Daniel Wagner <dwagner@...e.de>

[ Upstream commit 1c110588dd95d21782397ff3cbaa55820b4e1fad ]

The association life time is tied to the life time of the target port.
That means we should not take extra a refcount when creating a
association.

Reviewed-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Daniel Wagner <dwagner@...e.de>
Signed-off-by: Keith Busch <kbusch@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/target/fc.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 6d111b03d371..d50af99e847d 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -1108,12 +1108,9 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *tgtport, void *hosthandle)
 	if (idx < 0)
 		goto out_free_assoc;
 
-	if (!nvmet_fc_tgtport_get(tgtport))
-		goto out_ida;
-
 	assoc->hostport = nvmet_fc_alloc_hostport(tgtport, hosthandle);
 	if (IS_ERR(assoc->hostport))
-		goto out_put;
+		goto out_ida;
 
 	assoc->tgtport = tgtport;
 	assoc->a_id = idx;
@@ -1143,8 +1140,6 @@ nvmet_fc_alloc_target_assoc(struct nvmet_fc_tgtport *tgtport, void *hosthandle)
 
 	return assoc;
 
-out_put:
-	nvmet_fc_tgtport_put(tgtport);
 out_ida:
 	ida_free(&tgtport->assoc_cnt, idx);
 out_free_assoc:
@@ -1181,7 +1176,6 @@ nvmet_fc_target_assoc_free(struct kref *ref)
 	dev_info(tgtport->dev,
 		"{%d:%d} Association freed\n",
 		tgtport->fc_target_port.port_num, assoc->a_id);
-	nvmet_fc_tgtport_put(tgtport);
 	kfree(assoc);
 }
 
-- 
2.43.0