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| author | James Smart <jsmart2021@gmail.com> | 2019-11-15 02:15:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-01-09 12:18:54 +0300 |
| commit | 6c786e656cd9d46d4d54f2afa824dae7721607b4 (patch) | |
| tree | 5ac6d26354089a5149647b040dd6298b207ed479 /drivers/nvme/target/fcloop.c | |
| parent | 3d40d7117e353b84627c1e8c5ed9ae0b1237ef5c (diff) | |
| download | linux-6c786e656cd9d46d4d54f2afa824dae7721607b4.tar.xz | |
nvme_fc: add module to ops template to allow module references
[ Upstream commit 863fbae929c7a5b64e96b8a3ffb34a29eefb9f8f ]
In nvme-fc: it's possible to have connected active controllers
and as no references are taken on the LLDD, the LLDD can be
unloaded. The controller would enter a reconnect state and as
long as the LLDD resumed within the reconnect timeout, the
controller would resume. But if a namespace on the controller
is the root device, allowing the driver to unload can be problematic.
To reload the driver, it may require new io to the boot device,
and as it's no longer connected we get into a catch-22 that
eventually fails, and the system locks up.
Fix this issue by taking a module reference for every connected
controller (which is what the core layer did to the transport
module). Reference is cleared when the controller is removed.
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/nvme/target/fcloop.c')
| -rw-r--r-- | drivers/nvme/target/fcloop.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c index 291f4121f516..f0536d341f2f 100644 --- a/drivers/nvme/target/fcloop.c +++ b/drivers/nvme/target/fcloop.c @@ -825,6 +825,7 @@ fcloop_targetport_delete(struct nvmet_fc_target_port *targetport) #define FCLOOP_DMABOUND_4G 0xFFFFFFFF static struct nvme_fc_port_template fctemplate = { + .module = THIS_MODULE, .localport_delete = fcloop_localport_delete, .remoteport_delete = fcloop_remoteport_delete, .create_queue = fcloop_create_queue, |