nvme: fix memory leak for power latency tolerance

[ Upstream commit 510a405d945bc985abc513fafe45890cac34fafa ]

Unconditionally hide device pm latency tolerance when uninitializing
the controller to ensure all qos resources are released so that we're
not leaking this memory. This is safe to call if none were allocated in
the first place, or were previously freed.

Fixes: c5552fde102fc("nvme: Enable autonomous power state transitions")
Suggested-by: Keith Busch <keith.busch@intel.com>
Tested-by: David Milburn <dmilburn@redhat.com>
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
[changelog]
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 23c90382a515391b55fc666b34601dc59c453615..35d2202ee2fd1b0c055e802504a4f5aca936e215 100644 (file)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3699,6 +3699,7 @@ EXPORT_SYMBOL_GPL(nvme_start_ctrl);
 
 void nvme_uninit_ctrl(struct nvme_ctrl *ctrl)
 {
+       dev_pm_qos_hide_latency_tolerance(ctrl->device);
        cdev_device_del(&ctrl->cdev, ctrl->device);
 }
 EXPORT_SYMBOL_GPL(nvme_uninit_ctrl);