From: Christoph Hellwig <hch@lst.de>
Date: Wed, 16 Sep 2020 18:11:01 -0700
Subject: [PATCH] nvmet: get transport reference for passthru ctrl
Git-commit: 3a6b076168e20a50289d71f601f1dd02be0f8e88
Patch-mainline: v5.9-rc7
References: jsc#SLE-15608
Grab a reference to the transport driver to ensure it can't be unloaded
while a passthrough controller is active.
Fixes: c1fef73f793b ("nvmet: add passthru code to process commands")
Reported-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Hannes Reinecke <hare@suse.com>
---
drivers/nvme/target/passthru.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 8bd7f656e240..dacfa7435d0b 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -517,6 +517,7 @@ int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys)
subsys->ver = NVME_VS(1, 2, 1);
}
+ __module_get(subsys->passthru_ctrl->ops->module);
mutex_unlock(&subsys->lock);
return 0;
@@ -531,6 +532,7 @@ static void __nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
{
if (subsys->passthru_ctrl) {
xa_erase(&passthru_subsystems, subsys->passthru_ctrl->cntlid);
+ module_put(subsys->passthru_ctrl->ops->module);
nvme_put_ctrl(subsys->passthru_ctrl);
}
subsys->passthru_ctrl = NULL;
--
2.16.4