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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>
This commit is contained in:
Christoph Hellwig 2020-09-16 18:11:01 -07:00
parent 52a3974feb
commit 3a6b076168
1 changed files with 2 additions and 0 deletions
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2
drivers/nvme/target/passthru.c
View File

@ -517,6 +517,7 @@ int nvmet_passthru_ctrl_enable(struct nvmet_subsys *subsys)
subsys->ver = NVME_VS(1, 2, 1); subsys->ver = NVME_VS(1, 2, 1);
} }
__module_get(subsys->passthru_ctrl->ops->module);
mutex_unlock(&subsys->lock); mutex_unlock(&subsys->lock);
return 0; return 0;
@ -531,6 +532,7 @@ static void __nvmet_passthru_ctrl_disable(struct nvmet_subsys *subsys)
{ {
if (subsys->passthru_ctrl) { if (subsys->passthru_ctrl) {
xa_erase(&passthru_subsystems, subsys->passthru_ctrl->cntlid); xa_erase(&passthru_subsystems, subsys->passthru_ctrl->cntlid);
module_put(subsys->passthru_ctrl->ops->module);
nvme_put_ctrl(subsys->passthru_ctrl); nvme_put_ctrl(subsys->passthru_ctrl);
} }
subsys->passthru_ctrl = NULL; subsys->passthru_ctrl = NULL;