From: Alexander Sverdlin <alexander.sverdlin@gmail.com>
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>, linux-input@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH 4/4] Input: ep93xx_keypad - switch to using managed resources
Date: Tue, 12 Oct 2021 09:54:32 +0200 [thread overview]
Message-ID: <d1d1a1028c5db26d0b0eed2a5a9626124451fcf9.camel@gmail.com> (raw)
In-Reply-To: <20211012013735.3523140-4-dmitry.torokhov@gmail.com>
Hello Dmitry,
just one question below:
On Mon, 2021-10-11 at 18:37 -0700, Dmitry Torokhov wrote:
> By using managed resources (devm) we are able to streamline error handling
> in probe and remove most of the custom remove method.
>
> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> ---
> drivers/input/keyboard/ep93xx_keypad.c | 116 ++++++++-----------------
> 1 file changed, 36 insertions(+), 80 deletions(-)
>
> diff --git a/drivers/input/keyboard/ep93xx_keypad.c b/drivers/input/keyboard/ep93xx_keypad.c
> index a66cfeaf5b21..90157707dc05 100644
> --- a/drivers/input/keyboard/ep93xx_keypad.c
> +++ b/drivers/input/keyboard/ep93xx_keypad.c
...
> @@ -227,61 +234,46 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
> struct resource *res;
> int err;
>
> - keypad = kzalloc(sizeof(struct ep93xx_keypad), GFP_KERNEL);
> + keypad = devm_kzalloc(&pdev->dev, sizeof(*keypad), GFP_KERNEL);
> if (!keypad)
> return -ENOMEM;
>
> keypad->pdata = dev_get_platdata(&pdev->dev);
> - if (!keypad->pdata) {
> - err = -EINVAL;
> - goto failed_free;
> - }
> + if (!keypad->pdata)
> + return -EINVAL;
>
> keymap_data = keypad->pdata->keymap_data;
> - if (!keymap_data) {
> - err = -EINVAL;
> - goto failed_free;
> - }
> + if (!keymap_data)
> + return -EINVAL;
>
> keypad->irq = platform_get_irq(pdev, 0);
> - if (keypad->irq < 0) {
> - err = keypad->irq;
> - goto failed_free;
> - }
> + if (keypad->irq < 0)
> + return keypad->irq;
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!res) {
> - err = -ENXIO;
> - goto failed_free;
> - }
> -
> - res = request_mem_region(res->start, resource_size(res), pdev->name);
> - if (!res) {
> - err = -EBUSY;
> - goto failed_free;
> - }
> + if (!res)
> + return -ENXIO;
>
> - keypad->mmio_base = ioremap(res->start, resource_size(res));
> - if (keypad->mmio_base == NULL) {
> - err = -ENXIO;
> - goto failed_free_mem;
> - }
> + keypad->mmio_base = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(keypad->mmio_base))
> + return PTR_ERR(keypad->mmio_base);
>
> err = ep93xx_keypad_acquire_gpio(pdev);
> if (err)
> - goto failed_free_io;
> + return err;
> +
> + err = devm_add_action_or_reset(&pdev->dev,
> + ep93xx_keypad_release_gpio_action, pdev);
> + if (err)
> + return err;
>
> keypad->clk = clk_get(&pdev->dev, NULL);
Isn't the conversion to devm_clk_get() missing here?
> - if (IS_ERR(keypad->clk)) {
> - err = PTR_ERR(keypad->clk);
> - goto failed_free_gpio;
> - }
> + if (IS_ERR(keypad->clk))
> + return PTR_ERR(keypad->clk);
>
> - input_dev = input_allocate_device();
> - if (!input_dev) {
> - err = -ENOMEM;
> - goto failed_put_clk;
> - }
> + input_dev = devm_input_allocate_device(&pdev->dev);
> + if (!input_dev)
> + return -ENOMEM;
>
> keypad->input_dev = input_dev;
>
> @@ -289,26 +281,26 @@ static int ep93xx_keypad_probe(struct platform_device *pdev)
> input_dev->id.bustype = BUS_HOST;
> input_dev->open = ep93xx_keypad_open;
> input_dev->close = ep93xx_keypad_close;
> - input_dev->dev.parent = &pdev->dev;
>
> err = matrix_keypad_build_keymap(keymap_data, NULL,
> EP93XX_MATRIX_ROWS, EP93XX_MATRIX_COLS,
> keypad->keycodes, input_dev);
> if (err)
> - goto failed_free_dev;
> + return err;
>
> if (keypad->pdata->flags & EP93XX_KEYPAD_AUTOREPEAT)
> __set_bit(EV_REP, input_dev->evbit);
> input_set_drvdata(input_dev, keypad);
>
> - err = request_irq(keypad->irq, ep93xx_keypad_irq_handler,
> - 0, pdev->name, keypad);
> + err = devm_request_irq(&pdev->dev, keypad->irq,
> + ep93xx_keypad_irq_handler,
> + 0, pdev->name, keypad);
> if (err)
> - goto failed_free_dev;
> + return err;
>
> err = input_register_device(input_dev);
> if (err)
> - goto failed_free_irq;
> + return err;
>
> platform_set_drvdata(pdev, keypad);
>
--
Alexander Sverdlin.
next prev parent reply other threads:[~2021-10-12 7:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 1:37 [PATCH 1/4] Input: ep93xx_keypad - annotate suspend/resume as __maybe_unused Dmitry Torokhov
2021-10-12 1:37 ` [PATCH 2/4] Input: ep93xx_keypad - use BIT() and GENMASK() macros Dmitry Torokhov
2021-10-12 6:58 ` Alexander Sverdlin
2021-10-12 1:37 ` [PATCH 3/4] Input: ep93xx_keypad - use dev_pm_set_wake_irq() Dmitry Torokhov
2021-10-12 7:30 ` Alexander Sverdlin
2021-10-12 1:37 ` [PATCH 4/4] Input: ep93xx_keypad - switch to using managed resources Dmitry Torokhov
2021-10-12 7:54 ` Alexander Sverdlin [this message]
2021-10-13 2:34 ` Dmitry Torokhov
2021-10-13 2:36 ` [PATCH v2 " Dmitry Torokhov
2021-10-13 5:42 ` Alexander Sverdlin
2021-10-12 6:31 ` [PATCH 1/4] Input: ep93xx_keypad - annotate suspend/resume as __maybe_unused Alexander Sverdlin
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