Commit 437f8f9a authored Dec 06, 2015 by Matias Bjørling Committed by Jens Axboe Dec 07, 2015

lightnvm: check mm before use



The core can may issue I/Os before a media manager is registered with
the lightnvm subsystem. Make sure that we don't call the media manager
->end_io prematurely with a null pointer.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>

parent e9b76a80

drivers/nvme/host/lightnvm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -455,7 +455,7 @@ static void nvme_nvm_end_io(struct request *rq, int error)
		struct nvm_rq *rqd = rq->end_io_data;
		struct nvm_dev *dev = rqd->dev;

		if (dev->mt->end_io(rqd, error))
		if (dev->mt && dev->mt->end_io(rqd, error))
		pr_err("nvme: err status: %x result: %lx\n",
		rq->errors, (unsigned long)rq->special);