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From: Jonathan Cameron <jic23@kernel.org>
To: Alexandru Ardelean <aardelean@deviqon.com>
Cc: platform-driver-x86@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	coproscefalo@gmail.com, hdegoede@redhat.com,
	mgross@linux.intel.com, linux@deviqon.com
Subject: Re: [PATCH 03/10] platform/x86: toshiba_acpi: bind registration of miscdev object to parent
Date: Mon, 29 Mar 2021 15:33:56 +0100	[thread overview]
Message-ID: <20210329153356.1e817912@jic23-huawei> (raw)
In-Reply-To: <20210324125548.45983-4-aardelean@deviqon.com>

On Wed, 24 Mar 2021 14:55:41 +0200
Alexandru Ardelean <aardelean@deviqon.com> wrote:

> This change moves the registration of the Toshiba ACPI miscdev to be
> handled by the devm_add_action_or_reset() hook. This way, the miscdev will
> be unregistered when the reference count of the parent device object goes
> to zero.
> 
> This also changes the order of cleanup in toshiba_acpi_remove(), where the
> miscdev was deregistered first. Now it will be deregistered right before
> the toshiba_acpi_dev object is free'd.
> 
> Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com>
Reorder looks right to me, but maybe I'm missing something subtle.

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

One unrelated comment inline.

Jonathan

> ---
>  drivers/platform/x86/toshiba_acpi.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
> index c5284601bc2a..53ef565378ef 100644
> --- a/drivers/platform/x86/toshiba_acpi.c
> +++ b/drivers/platform/x86/toshiba_acpi.c
> @@ -2963,8 +2963,6 @@ static int toshiba_acpi_remove(struct acpi_device *acpi_dev)
>  {
>  	struct toshiba_acpi_dev *dev = acpi_driver_data(acpi_dev);
>  
> -	misc_deregister(&dev->miscdev);
> -
>  	remove_toshiba_proc_entries(dev);
>  
>  	if (dev->accelerometer_supported && dev->indio_dev) {
> @@ -3014,6 +3012,13 @@ static void toshiba_acpi_singleton_clear(void *data)
>  	toshiba_acpi = NULL;
>  }
>  
> +static void toshiba_acpi_misc_deregister(void *data)
> +{
> +	struct miscdevice *miscdev = data;
> +
> +	misc_deregister(miscdev);
> +}
> +
>  static int toshiba_acpi_add(struct acpi_device *acpi_dev)
>  {
>  	struct device *parent = &acpi_dev->dev;
> @@ -3056,6 +3061,11 @@ static int toshiba_acpi_add(struct acpi_device *acpi_dev)
>  		return ret;
>  	}
>  
> +	ret = devm_add_action_or_reset(parent, toshiba_acpi_misc_deregister,
> +				       &dev->miscdev);
> +	if (ret)
> +		return ret;
> +
>  	acpi_dev->driver_data = dev;
>  	dev_set_drvdata(&acpi_dev->dev, dev);

Why are we carrying two copies of the same thing? (obviously unrelated
to your patch :)

>  


  reply	other threads:[~2021-03-29 14:34 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-24 12:55 [PATCH 00/10] platform/x86: toshiba_acpi: move acpi add/remove to device-managed routines Alexandru Ardelean
2021-03-24 12:55 ` [PATCH 01/10] platform/x86: toshiba_acpi: bind life-time of toshiba_acpi_dev to parent Alexandru Ardelean
2021-03-29 14:30   ` Jonathan Cameron
2021-03-30  6:49     ` Alexandru Ardelean
2021-03-24 12:55 ` [PATCH 02/10] platform/x86: toshiba_acpi: use devm_add_action_or_reset() for singleton clear Alexandru Ardelean
2021-03-29 14:27   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 03/10] platform/x86: toshiba_acpi: bind registration of miscdev object to parent Alexandru Ardelean
2021-03-29 14:33   ` Jonathan Cameron [this message]
2021-03-24 12:55 ` [PATCH 04/10] platform/x86: toshiba_acpi: use device-managed functions for input device Alexandru Ardelean
2021-03-29 14:48   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 05/10] platform/x86: toshiba_acpi: register backlight with device-managed variant Alexandru Ardelean
2021-03-29 14:50   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 06/10] platform/x86: toshiba_acpi: use devm_led_classdev_register() for LEDs Alexandru Ardelean
2021-03-29 14:52   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 07/10] platform/x86: toshiba_acpi: use device-managed functions for accelerometer Alexandru Ardelean
2021-03-29 14:54   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 08/10] platform/x86: toshiba_acpi: use device-managed for wwan_rfkill management Alexandru Ardelean
2021-03-29 14:57   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 09/10] platform/x86: toshiba_acpi: use device-managed for sysfs removal Alexandru Ardelean
2021-03-29 15:09   ` Jonathan Cameron
2021-03-24 12:55 ` [PATCH 10/10] platform/x86: toshiba_acpi: bind proc entries creation to parent Alexandru Ardelean
2021-03-29 15:10   ` Jonathan Cameron
2021-03-29 12:38 ` [PATCH 00/10] platform/x86: toshiba_acpi: move acpi add/remove to device-managed routines Jonathan Cameron
2021-03-29 14:01   ` Alexandru Ardelean
2021-03-30  8:20 ` Hans de Goede
2021-03-30  9:22   ` Alexandru Ardelean
2021-03-30  9:27     ` Hans de Goede

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