linux-kernel - Re: [PATCH v5 08/11] input: raspberrypi-ts: Release firmware handle when not needed

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Message-ID: <20201202060347.GA2034289@dtor-ws>
Date:   Tue, 1 Dec 2020 22:03:47 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     u.kleine-koenig@...gutronix.de, linux-kernel@...r.kernel.org,
        f.fainelli@...il.com, linux-pwm@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        wahrenst@....net, linux-input@...r.kernel.org,
        gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        p.zabel@...gutronix.de, linux-gpio@...r.kernel.org,
        linus.walleij@...aro.org, linux-clk@...r.kernel.org,
        sboyd@...nel.org, linux-rpi-kernel@...ts.infradead.org,
        bgolaszewski@...libre.com, andy.shevchenko@...il.com
Subject: Re: [PATCH v5 08/11] input: raspberrypi-ts: Release firmware handle
 when not needed

Hi Nicolas,

On Mon, Nov 23, 2020 at 07:38:29PM +0100, Nicolas Saenz Julienne wrote:
> Use devm_rpi_firmware_get() so as to make sure we release RPi's firmware
> interface when unbinding the device.

I do not believe this comment is correct any longer. Otherwise:

Acked-by: Dmitry Torokhov <dmitry.torokhov@...il.com>

> 
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
> 
> ---
> 
> Changes since v3:
>  - Release firmware handle in probe function
> 
> Changes since v2:
>  - Use devm_rpi_firmware_get(), instead of remove function
> 
>  drivers/input/touchscreen/raspberrypi-ts.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/input/touchscreen/raspberrypi-ts.c b/drivers/input/touchscreen/raspberrypi-ts.c
> index ef6aaed217cf..5000f5fd9ec3 100644
> --- a/drivers/input/touchscreen/raspberrypi-ts.c
> +++ b/drivers/input/touchscreen/raspberrypi-ts.c
> @@ -160,7 +160,7 @@ static int rpi_ts_probe(struct platform_device *pdev)
>  	touchbuf = (u32)ts->fw_regs_phys;
>  	error = rpi_firmware_property(fw, RPI_FIRMWARE_FRAMEBUFFER_SET_TOUCHBUF,
>  				      &touchbuf, sizeof(touchbuf));
> -
> +	rpi_firmware_put(fw);
>  	if (error || touchbuf != 0) {
>  		dev_warn(dev, "Failed to set touchbuf, %d\n", error);
>  		return error;
> -- 
> 2.29.2
> 

-- 
Dmitry