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Commit 008b7443 authored by Matias Bjørling's avatar Matias Bjørling Committed by Jens Axboe
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lightnvm: prevent gennvm module unload on use 



After the gennvm module has been initialized. It might be attached to
one or several devices. In that case, the module is in use. Make sure
that it can not be unloaded.

Signed-off-by: default avatarMatias Bjørling <m@bjorling.me>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 762796bc

drivers/lightnvm/gennvm.c

+5 −0
Original line number Diff line number Diff line
@@ -219,6 +219,9 @@ static int gennvm_register(struct nvm_dev *dev) 
	struct gen_nvm *gn;

	int ret;



	if (!try_module_get(THIS_MODULE))

		return -ENODEV;



	gn = kzalloc(sizeof(struct gen_nvm), GFP_KERNEL);

	if (!gn)

		return -ENOMEM;
@@ -242,12 +245,14 @@ static int gennvm_register(struct nvm_dev *dev) 
	return 1;

err:

	gennvm_free(dev);

	module_put(THIS_MODULE);

	return ret;

}



static void gennvm_unregister(struct nvm_dev *dev)

{

	gennvm_free(dev);

	module_put(THIS_MODULE);

}



static struct nvm_block *gennvm_get_blk(struct nvm_dev *dev,