From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com> commit 64c7d7ea22d86cacb65d0c097cc447bc0e6d8abd upstream. clk_pm_runtime_get() assumes that the PM-runtime usage counter will be dropped by pm_runtime_get_sync() on errors, which is not the case, so PM-runtime references to devices acquired by the former are leaked on errors returned by the latter. Fix this by modifying clk_pm_runtime_get() to drop the reference if pm_runtime_get_sync() returns an error. Fixes: 9a34b45397e5 clk: Add support for runtime PM Cc: 4.15+ <stable@vger.kernel.org> # 4.15+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/clk/clk.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index a102eb1abe4b..8353ab9bd31b 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -101,7 +101,11 @@ static int clk_pm_runtime_get(struct clk_core *core) return 0; ret = pm_runtime_get_sync(core->dev); - return ret < 0 ? ret : 0; + if (ret < 0) { + pm_runtime_put_noidle(core->dev); + return ret; + } + return 0; } static void clk_pm_runtime_put(struct clk_core *core) -- 2.25.1