From: Yufen Yu <yuyufen@huawei.com>
Date: Fri, 17 May 2019 02:30:07 +0000 (-0700)
Subject: nvme: fix memory leak for power latency tolerance
X-Git-Tag: v5.2-rc2~8^2^2~3
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=510a405d945bc985abc513fafe45890cac34fafa;p=linux.git

nvme: fix memory leak for power latency tolerance

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>
---

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d4226c18eb71..e1449c196f20 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3700,6 +3700,7 @@ 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);