Messages in this thread Patch in this message | | | From | Dmitry Torokhov <> | Subject | [PATCH 5/5] W1: w1-gpio - switch to using managed resources (devm) | Date | Fri, 22 Feb 2013 23:58:40 -0800 |
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This simplifies error unwinding and device teardown.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> --- drivers/w1/masters/w1-gpio.c | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-)
diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c index ee6b6e3..19439f8 100644 --- a/drivers/w1/masters/w1-gpio.c +++ b/drivers/w1/masters/w1-gpio.c @@ -116,25 +116,26 @@ static int w1_gpio_probe(struct platform_device *pdev) return err; } - w1_gpio = kzalloc(sizeof(struct w1_gpio), GFP_KERNEL); + w1_gpio = devm_kzalloc(&pdev->dev, sizeof(struct w1_gpio), GFP_KERNEL); if (!w1_gpio) { dev_err(&pdev->dev, "Out of memory\n"); return -ENOMEM; } - err = gpio_request(pdata->pin, "w1"); + err = devm_gpio_request(&pdev->dev, pdata->pin, "w1"); if (err) { dev_err(&pdev->dev, "gpio_request (pin) failed\n"); - goto free_master; + return err; } if (gpio_is_valid(pdata->ext_pullup_enable_pin)) { - err = gpio_request_one(pdata->ext_pullup_enable_pin, - GPIOF_INIT_LOW, "w1 pullup"); + err = devm_gpio_request_one(&pdev->dev, + pdata->ext_pullup_enable_pin, + GPIOF_INIT_LOW, "w1 pullup"); if (err < 0) { - dev_err(&pdev->dev, "gpio_request_one " - "(ext_pullup_enable_pin) failed\n"); - goto free_gpio; + dev_err(&pdev->dev, + "gpio_request_one (ext_pullup_enable_pin) failed\n"); + return err; } } @@ -154,7 +155,7 @@ static int w1_gpio_probe(struct platform_device *pdev) err = w1_add_master_device(&w1_gpio->master); if (err) { dev_err(&pdev->dev, "w1_add_master device failed\n"); - goto free_gpio_ext_pu; + return err; } if (pdata->enable_external_pullup) @@ -166,16 +167,6 @@ static int w1_gpio_probe(struct platform_device *pdev) platform_set_drvdata(pdev, w1_gpio); return 0; - - free_gpio_ext_pu: - if (gpio_is_valid(pdata->ext_pullup_enable_pin)) - gpio_free(pdata->ext_pullup_enable_pin); - free_gpio: - gpio_free(pdata->pin); - free_master: - kfree(w1_gpio); - - return err; } static int w1_gpio_remove(struct platform_device *pdev) @@ -190,8 +181,6 @@ static int w1_gpio_remove(struct platform_device *pdev) gpio_set_value(pdata->ext_pullup_enable_pin, 0); w1_remove_master_device(&w1_gpio->master); - gpio_free(pdata->pin); - kfree(w1_gpio); return 0; } -- 1.7.11.7
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