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| author | Ming Lei <ming.lei@redhat.com> | 2017-11-09 12:32:07 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-11-11 03:53:25 +0100 |
| commit | 03e0f3a65e4da497c3b7b213c68943cbc73a2e34 (patch) | |
| tree | 0eff01e06d1998f467cfff23abaebba9316b77c6 /drivers/nvme/target/discovery.c | |
| parent | nvme: send uevent for some asynchronous events (diff) | |
| download | linux-03e0f3a65e4da497c3b7b213c68943cbc73a2e34.tar.xz linux-03e0f3a65e4da497c3b7b213c68943cbc73a2e34.zip | |
nvme-pci: avoid dereference of symbol from unloaded module
The 'remove_work' may be scheduled to run after nvme_remove()
returns since we can't simply cancel it in nvme_remove() for
avoiding deadlock. Once nvme_remove() returns, this module(nvme)
can be unloaded.
On the other hand, nvme_put_ctrl() calls ctr->ops->free_ctrl
which may point to nvme_pci_free_ctrl() in unloaded module.
This patch avoids this issue by queuing 'remove_work' via 'nvme_wq',
and flush this worqueue in nvme_exit() as suggested by Sagi.
Suggested-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/target/discovery.c')
0 files changed, 0 insertions, 0 deletions