From: Keith Busch <kbusch@kernel.org>
To: linux-nvme@lists.infradead.org, hch@lst.de, sagi@grimberg.me
Cc: Keith Busch <kbusch@kernel.org>
Subject: [PATCH] nvme: fix controller instance leak
Date: Wed, 26 Aug 2020 10:53:04 -0700 [thread overview]
Message-ID: <20200826175304.2151626-1-kbusch@kernel.org> (raw)
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@kernel.org>
---
drivers/nvme/host/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 154942fc64eb..be7c609b3d07 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4390,7 +4390,7 @@ static void nvme_free_ctrl(struct device *dev)
struct nvme_subsystem *subsys = ctrl->subsys;
struct nvme_cel *cel, *next;
- if (subsys && ctrl->instance != subsys->instance)
+ if (!subsys || ctrl->instance != subsys->instance)
ida_simple_remove(&nvme_instance_ida, ctrl->instance);
list_for_each_entry_safe(cel, next, &ctrl->cels, entry) {
--
2.24.1
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next reply other threads:[~2020-08-26 17:53 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-26 17:53 Keith Busch [this message]
2020-08-26 18:10 ` [PATCH] nvme: fix controller instance leak Chaitanya Kulkarni
2020-08-27 6:40 ` Christoph Hellwig
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