pm_runtime_get_sync() unconditionally increments the runtime PM usage
counter. If mutex_lock_interruptible() is interrupted, the function
returns without dropping that reference. Add the missing
pm_runtime_put_sync_autosuspend() call on the error path.

Fixes: 672865080a8f ("Input: cyapa - add runtime power management support")
Cc: stable@vger.kernel.org
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/input/mouse/cyapa.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
index 6e0d956617a1..5edf4fdbb373 100644
--- a/drivers/input/mouse/cyapa.c
+++ b/drivers/input/mouse/cyapa.c
@@ -901,8 +901,10 @@ static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
 	pm_runtime_get_sync(dev);
 
 	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
-	if (error)
+	if (error) {
+		pm_runtime_put_sync_autosuspend(dev);
 		return error;
+	}
 
 	cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000);
 	cyapa->runtime_suspend_power_mode =
-- 
2.34.1

Hi Wentao,

On Wed, Sep 16, 2026 at 06:50:15PM +0000, Wentao Liang wrote:
> pm_runtime_get_sync() unconditionally increments the runtime PM usage
> counter. If mutex_lock_interruptible() is interrupted, the function
> returns without dropping that reference. Add the missing
> pm_runtime_put_sync_autosuspend() call on the error path.
> 
> Fixes: 672865080a8f ("Input: cyapa - add runtime power management support")
> Cc: stable@vger.kernel.org
> Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
> ---
>  drivers/input/mouse/cyapa.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/input/mouse/cyapa.c b/drivers/input/mouse/cyapa.c
> index 6e0d956617a1..5edf4fdbb373 100644
> --- a/drivers/input/mouse/cyapa.c
> +++ b/drivers/input/mouse/cyapa.c
> @@ -901,8 +901,10 @@ static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
>  	pm_runtime_get_sync(dev);
>  
>  	error = mutex_lock_interruptible(&cyapa->state_sync_lock);
> -	if (error)
> +	if (error) {
> +		pm_runtime_put_sync_autosuspend(dev);

Why does it have to be "sync" variant?

Thanks.

-- 
Dmitry