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| author |   Matias Bjørling <m@bjorling.me> | 2015-12-06 11:25:46 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2015-12-07 09:14:19 -0700 |
| commit | 437f8f9a1e923deab6c61822c36f29f4a2198cfe (patch) | |
| tree | 65aef1e138b3ab6e5dbe53782e41dc8c9a8aa36e /drivers/nvme/host/lightnvm.c | |
| parent | lightnvm: refactor spin_unlock in gennvm_get_blk (diff) | |
| download | linux-dev-437f8f9a1e923deab6c61822c36f29f4a2198cfe.tar.xz linux-dev-437f8f9a1e923deab6c61822c36f29f4a2198cfe.zip | |
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>
Diffstat (limited to '')
| -rw-r--r-- | drivers/nvme/host/lightnvm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/nvme/host/lightnvm.c b/drivers/nvme/host/lightnvm.c index 06c336410235..762c9a7cbfa6 100644 --- a/drivers/nvme/host/lightnvm.c +++ b/drivers/nvme/host/lightnvm.c @@ -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); |