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Message-ID: <20140529072602.GJ11817@core.coreip.homeip.net>
Date: Thu, 29 May 2014 00:26:02 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Himangi Saraogi <himangi774@...il.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
julia.lawall@...6.fr
Subject: Re: [PATCH] input: ab8500-ponkey: Allocate resources using managed
interfaces
On Thu, May 29, 2014 at 01:42:00AM +0530, Himangi Saraogi wrote:
> This patch moves most data allocated in the probe function from
> unmanaged interfaces to managed interfaces. The kfrees and error
> handling code is done away with. Also, the unnecesary labels are
> removed and the function ab8500_ponkey_remove is removed as it becomes
> empty after removing the no longer required function calls. Also,
> linux/device.h is added to make sure the devm_*() routine declarations
> are unambiguously available.
>
> The following Coccinelle semantic patch was used for making a part of
> the change:
>
> @platform@
> identifier p, probefn, removefn;
> @@
> struct platform_driver p = {
> .probe = probefn,
> .remove = removefn,
> };
>
> @prb@
> identifier platform.probefn, pdev;
> expression e, e1, e2;
> @@
> probefn(struct platform_device *pdev, ...) {
> <+...
> - e = kzalloc(e1, e2)
> + e = devm_kzalloc(&pdev->dev, e1, e2)
> ...
> ?-kfree(e);
> ...+>
> }
>
> @rem depends on prb@
> identifier platform.removefn;
> expression e;
> @@
> removefn(...) {
> <...
> - kfree(e);
> ...>
> }
>
> Signed-off-by: Himangi Saraogi <himangi774@...il.com>
> Acked-by: Julia Lawall <julia.lawall@...6.fr>
Applied, thank you.
> ---
> To send to: Dmitry Torokhov <dmitry.torokhov@...il.com>,linux-input@...r.kernel.org,linux-kernel@...r.kernel.org
>
> drivers/input/misc/ab8500-ponkey.c | 51 +++++++++++---------------------------
> 1 file changed, 15 insertions(+), 36 deletions(-)
>
> diff --git a/drivers/input/misc/ab8500-ponkey.c b/drivers/input/misc/ab8500-ponkey.c
> index f2fbdd8..89fb1c6 100644
> --- a/drivers/input/misc/ab8500-ponkey.c
> +++ b/drivers/input/misc/ab8500-ponkey.c
> @@ -7,6 +7,7 @@
> * AB8500 Power-On Key handler
> */
>
> +#include <linux/device.h>
> #include <linux/kernel.h>
> #include <linux/module.h>
> #include <linux/platform_device.h>
> @@ -65,12 +66,11 @@ static int ab8500_ponkey_probe(struct platform_device *pdev)
> return irq_dbr;
> }
>
> - ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
> - input = input_allocate_device();
> - if (!ponkey || !input) {
> - error = -ENOMEM;
> - goto err_free_mem;
> - }
> + ponkey = devm_kzalloc(&pdev->dev, sizeof(struct ab8500_ponkey),
> + GFP_KERNEL);
> + input = devm_input_allocate_device(&pdev->dev);
> + if (!ponkey || !input)
> + return -ENOMEM;
>
> ponkey->idev = input;
> ponkey->ab8500 = ab8500;
> @@ -82,52 +82,32 @@ static int ab8500_ponkey_probe(struct platform_device *pdev)
>
> input_set_capability(input, EV_KEY, KEY_POWER);
>
> - error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
> - 0, "ab8500-ponkey-dbf", ponkey);
> + error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbf,
> + ab8500_ponkey_handler, 0,
> + "ab8500-ponkey-dbf", ponkey);
> if (error < 0) {
> dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
> ponkey->irq_dbf, error);
> - goto err_free_mem;
> + return error;
> }
>
> - error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
> - 0, "ab8500-ponkey-dbr", ponkey);
> + error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbr,
> + ab8500_ponkey_handler, 0,
> + "ab8500-ponkey-dbr", ponkey);
> if (error < 0) {
> dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
> ponkey->irq_dbr, error);
> - goto err_free_dbf_irq;
> + return error;
> }
>
> error = input_register_device(ponkey->idev);
> if (error) {
> dev_err(ab8500->dev, "Can't register input device: %d\n", error);
> - goto err_free_dbr_irq;
> + return error;
> }
>
> platform_set_drvdata(pdev, ponkey);
> return 0;
> -
> -err_free_dbr_irq:
> - free_irq(ponkey->irq_dbr, ponkey);
> -err_free_dbf_irq:
> - free_irq(ponkey->irq_dbf, ponkey);
> -err_free_mem:
> - input_free_device(input);
> - kfree(ponkey);
> -
> - return error;
> -}
> -
> -static int ab8500_ponkey_remove(struct platform_device *pdev)
> -{
> - struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
> -
> - free_irq(ponkey->irq_dbf, ponkey);
> - free_irq(ponkey->irq_dbr, ponkey);
> - input_unregister_device(ponkey->idev);
> - kfree(ponkey);
> -
> - return 0;
> }
>
> #ifdef CONFIG_OF
> @@ -144,7 +124,6 @@ static struct platform_driver ab8500_ponkey_driver = {
> .of_match_table = of_match_ptr(ab8500_ponkey_match),
> },
> .probe = ab8500_ponkey_probe,
> - .remove = ab8500_ponkey_remove,
> };
> module_platform_driver(ab8500_ponkey_driver);
>
> --
> 1.9.1
>
--
Dmitry
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