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gpio: vf610: Use devres to disable clk_port 

Clk_port should be disabled in all error paths in the code that
follws, including the case when either gpiochip_add_data() or
gpiochip_irqchip_add() fail. To simplify things fix this by using
devm_add_action_or_reset() to disable corresponding clock in case of
any erros as well as driver/device removal.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-imx@nxp.com
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
hifive-unleashed-5.2
Andrey Smirnov 2019-03-10 23:27:34 -07:00 committed by Bartosz Golaszewski
parent 4a8909d022
commit db9ed63ca5
1 changed files with 10 additions and 6 deletions
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16
drivers/gpio/gpio-vf610.c
View File

@ -232,6 +232,11 @@ static int vf610_gpio_irq_set_wake(struct irq_data *d, u32 enable)
return 0;
}
static void vf610_gpio_disable_clk(void *data)
{
clk_disable_unprepare(data);
}
static int vf610_gpio_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@ -267,6 +272,10 @@ static int vf610_gpio_probe(struct platform_device *pdev)
ret = clk_prepare_enable(port->clk_port);
if (ret)
return ret;
ret = devm_add_action_or_reset(dev, vf610_gpio_disable_clk,
port->clk_port);
if (ret)
return ret;
} else if (port->clk_port == ERR_PTR(-EPROBE_DEFER)) {
/*
* Percolate deferrals, for anything else,
@ -278,12 +287,9 @@ static int vf610_gpio_probe(struct platform_device *pdev)
port->clk_gpio = devm_clk_get(&pdev->dev, "gpio");
if (!IS_ERR(port->clk_gpio)) {
ret = clk_prepare_enable(port->clk_gpio);
if (ret) {
clk_disable_unprepare(port->clk_port);
if (ret)
return ret;
}
} else if (port->clk_gpio == ERR_PTR(-EPROBE_DEFER)) {
clk_disable_unprepare(port->clk_port);
return PTR_ERR(port->clk_gpio);
}
@ -339,8 +345,6 @@ static int vf610_gpio_remove(struct platform_device *pdev)
struct vf610_gpio_port *port = platform_get_drvdata(pdev);
gpiochip_remove(&port->gc);
if (!IS_ERR(port->clk_port))
clk_disable_unprepare(port->clk_port);
if (!IS_ERR(port->clk_gpio))
clk_disable_unprepare(port->clk_gpio);