This is a note to let you know that I've just added the patch titled HSI: Fix PM usage counter unbalance in ssi_hw_init 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: hsi-fix-pm-usage-counter-unbalance-in-ssi_hw_init.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 b35db57fec1fc4bd5b34a2b4653f6ee752f031e5 Author: Zhang Qilong <zhangqilong3@xxxxxxxxxx> Date: Mon Nov 23 18:18:27 2020 +0800 HSI: Fix PM usage counter unbalance in ssi_hw_init [ Upstream commit aa57e77b3d28f0df07149d88c47bc0f3aa77330b ] pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. We fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Fixes: b209e047bc743 ("HSI: Introduce OMAP SSI driver") Signed-off-by: Zhang Qilong <zhangqilong3@xxxxxxxxxx> Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c index 2be9c01e175ca..f36036be7f032 100644 --- a/drivers/hsi/controllers/omap_ssi_core.c +++ b/drivers/hsi/controllers/omap_ssi_core.c @@ -424,7 +424,7 @@ static int ssi_hw_init(struct hsi_controller *ssi) struct omap_ssi_controller *omap_ssi = hsi_controller_drvdata(ssi); int err; - err = pm_runtime_get_sync(ssi->device.parent); + err = pm_runtime_resume_and_get(ssi->device.parent); if (err < 0) { dev_err(&ssi->device, "runtime PM failed %d\n", err); return err;