This is a note to let you know that I've just added the patch titled
nvme: fix controller instance leak
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nvme-fix-controller-instance-leak.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit bc1cb94594f3dcb748ac92db3e686526759a58e5
Author: Keith Busch <kbusch@xxxxxxxxxx>
Date: Wed Aug 26 10:53:04 2020 -0700
nvme: fix controller instance leak
[ Upstream commit 192f6c29bb28bfd0a17e6ad331d09f1ec84143d0 ]
If the driver has to unbind from the controller for an early failure
before the subsystem has been set up, there won't be a subsystem holding
the controller's instance, so the controller needs to free its own
instance in this case.
Fixes: 733e4b69d508d ("nvme: Assign subsys instance from first ctrl")
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index ff5681da8780d..3cb017fa3a790 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4012,7 +4012,7 @@ static void nvme_free_ctrl(struct device *dev)
container_of(dev, struct nvme_ctrl, ctrl_device);
struct nvme_subsystem *subsys = ctrl->subsys;
- if (subsys && ctrl->instance != subsys->instance)
+ if (!subsys || ctrl->instance != subsys->instance)
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
kfree(ctrl->effects);
