| Message ID | 20201030154909.100023-1-zhangqilong3@huawei.com |
|---|---|
| State | New |
| Headers | show |
| Series | watchdog: rti-wdt: fix reference leak in rti_wdt_probe | expand |
On Fri, Oct 30, 2020 at 11:49:09PM +0800, Zhang Qilong wrote: > pm_runtime_get_sync() will increment pm usage counter even it > failed. Forgetting to call pm_runtime_put_noidle will result > in reference leak in rti_wdt_probe, so we should fix it. > > Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/rti_wdt.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/watchdog/rti_wdt.c b/drivers/watchdog/rti_wdt.c > index 836319cbaca9..359302f71f7e 100644 > --- a/drivers/watchdog/rti_wdt.c > +++ b/drivers/watchdog/rti_wdt.c > @@ -227,8 +227,10 @@ static int rti_wdt_probe(struct platform_device *pdev) > > pm_runtime_enable(dev); > ret = pm_runtime_get_sync(dev); > - if (ret) > + if (ret) { > + pm_runtime_put_noidle(dev); > return dev_err_probe(dev, ret, "runtime pm failed\n"); > + } > > platform_set_drvdata(pdev, wdt); > > -- > 2.17.1 >
diff --git a/drivers/watchdog/rti_wdt.c b/drivers/watchdog/rti_wdt.c index 836319cbaca9..359302f71f7e 100644 --- a/drivers/watchdog/rti_wdt.c +++ b/drivers/watchdog/rti_wdt.c @@ -227,8 +227,10 @@ static int rti_wdt_probe(struct platform_device *pdev) pm_runtime_enable(dev); ret = pm_runtime_get_sync(dev); - if (ret) + if (ret) { + pm_runtime_put_noidle(dev); return dev_err_probe(dev, ret, "runtime pm failed\n"); + } platform_set_drvdata(pdev, wdt);
pm_runtime_get_sync() will increment pm usage counter even it failed. Forgetting to call pm_runtime_put_noidle will result in reference leak in rti_wdt_probe, so we should fix it. Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com> --- drivers/watchdog/rti_wdt.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)