[PATCH 2/5] pwm: atmel-tcb: Fix resource freeing in error path and remove

[claudiu beznea]

On 19.07.2023 22:20, Uwe Kleine-König wrote:
> Several resources were not freed in the error path and the remove
> function. Add the forgotten items.
> 
> Fixes: 34cbcd72588f ("pwm: atmel-tcb: Add sama5d2 support")
> Fixes: 061f8572a31c ("pwm: atmel-tcb: Switch to new binding")
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>

Reviewed-by: Claudiu Beznea <claudiu.beznea at tuxon.dev>

> ---
>   drivers/pwm/pwm-atmel-tcb.c | 23 +++++++++++++++++------
>   1 file changed, 17 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-atmel-tcb.c b/drivers/pwm/pwm-atmel-tcb.c
> index 613dd1810fb5..2826fc216d29 100644
> --- a/drivers/pwm/pwm-atmel-tcb.c
> +++ b/drivers/pwm/pwm-atmel-tcb.c
> @@ -450,16 +450,20 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
>   	tcbpwm->clk = of_clk_get_by_name(np->parent, clk_name);
>   	if (IS_ERR(tcbpwm->clk))
>   		tcbpwm->clk = of_clk_get_by_name(np->parent, "t0_clk");
> -	if (IS_ERR(tcbpwm->clk))
> -		return PTR_ERR(tcbpwm->clk);
> +	if (IS_ERR(tcbpwm->clk)) {
> +		err = PTR_ERR(tcbpwm->clk);
> +		goto err_slow_clk;
> +	}
>   
>   	match = of_match_node(atmel_tcb_of_match, np->parent);
>   	config = match->data;
>   
>   	if (config->has_gclk) {
>   		tcbpwm->gclk = of_clk_get_by_name(np->parent, "gclk");
> -		if (IS_ERR(tcbpwm->gclk))
> -			return PTR_ERR(tcbpwm->gclk);
> +		if (IS_ERR(tcbpwm->gclk)) {
> +			err = PTR_ERR(tcbpwm->gclk);
> +			goto err_clk;
> +		}
>   	}
>   
>   	tcbpwm->chip.dev = &pdev->dev;
> @@ -470,7 +474,7 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
>   
>   	err = clk_prepare_enable(tcbpwm->slow_clk);
>   	if (err)
> -		goto err_slow_clk;
> +		goto err_gclk;
>   
>   	spin_lock_init(&tcbpwm->lock);
>   
> @@ -485,6 +489,12 @@ static int atmel_tcb_pwm_probe(struct platform_device *pdev)
>   err_disable_clk:
>   	clk_disable_unprepare(tcbpwm->slow_clk);
>   
> +err_gclk:
> +	clk_put(tcbpwm->gclk);
> +
> +err_clk:
> +	clk_put(tcbpwm->clk);
> +
>   err_slow_clk:
>   	clk_put(tcbpwm->slow_clk);
>   
> @@ -498,8 +508,9 @@ static void atmel_tcb_pwm_remove(struct platform_device *pdev)
>   	pwmchip_remove(&tcbpwm->chip);
>   
>   	clk_disable_unprepare(tcbpwm->slow_clk);
> -	clk_put(tcbpwm->slow_clk);
> +	clk_put(tcbpwm->gclk);
>   	clk_put(tcbpwm->clk);
> +	clk_put(tcbpwm->slow_clk);
>   }
>   
>   static const struct of_device_id atmel_tcb_pwm_dt_ids[] = {