forked from Minki/linux
nvmet: get transport reference for passthru ctrl
Grab a reference to the transport driver to ensure it can't be unloaded
while a passthrough controller is active.
Fixes: c1fef73f79
("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>
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@ -517,6 +517,7 @@ int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys)
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subsys->ver = NVME_VS(1, 2, 1);
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}
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__module_get(subsys->passthru_ctrl->ops->module);
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mutex_unlock(&subsys->lock);
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return 0;
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@ -531,6 +532,7 @@ static void __nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
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{
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if (subsys->passthru_ctrl) {
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xa_erase(&passthru_subsystems, subsys->passthru_ctrl->cntlid);
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module_put(subsys->passthru_ctrl->ops->module);
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nvme_put_ctrl(subsys->passthru_ctrl);
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}
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subsys->passthru_ctrl = NULL;
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