linux-kernel - Re: [PATCH] drm/connector: Remove usage of the deprecated ida_simple

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Date:   Thu, 16 Jun 2022 21:23:25 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Bo Liu <liubo03@...pur.com>, maarten.lankhorst@...ux.intel.com,
        mripard@...nel.org, tzimmermann@...e.de, airlied@...ux.ie,
        daniel@...ll.ch
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/connector: Remove usage of the deprecated
 ida_simple_xxx API

Le 16/06/2022 à 07:18, Bo Liu a écrit :
> Use ida_alloc_xxx()/ida_free() instead of
> ida_simple_get()/ida_simple_remove().
> The latter is deprecated and more verbose.
> 
> Signed-off-by: Bo Liu <liubo03@...pur.com>
> ---
>   drivers/gpu/drm/drm_connector.c | 12 ++++++------
>   1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 1c48d162c77e..e3484b115ae6 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -250,7 +250,7 @@ int drm_connector_init(struct drm_device *dev,
>   	connector->funcs = funcs;
>   
>   	/* connector index is used with 32bit bitmasks */
> -	ret = ida_simple_get(&config->connector_ida, 0, 32, GFP_KERNEL);
> +	ret = ida_alloc_max(&config->connector_ida, 31, GFP_KERNEL);
>   	if (ret < 0) {
>   		DRM_DEBUG_KMS("Failed to allocate %s connector index: %d\n",
>   			      drm_connector_enum_list[connector_type].name,
> @@ -262,7 +262,7 @@ int drm_connector_init(struct drm_device *dev,
>   
>   	connector->connector_type = connector_type;
>   	connector->connector_type_id =
> -		ida_simple_get(connector_ida, 1, 0, GFP_KERNEL);
> +		ida_alloc_min(connector_ida, 1, GFP_KERNEL);
>   	if (connector->connector_type_id < 0) {
>   		ret = connector->connector_type_id;
>   		goto out_put_id;
> @@ -322,10 +322,10 @@ int drm_connector_init(struct drm_device *dev,
>   	connector->debugfs_entry = NULL;
>   out_put_type_id:
>   	if (ret)
> -		ida_simple_remove(connector_ida, connector->connector_type_id);
> +		ida_free(connector_ida, connector->connector_type_id);
>   out_put_id:
>   	if (ret)
> -		ida_simple_remove(&config->connector_ida, connector->index);
> +		ida_free(&config->connector_ida, connector->index);
>   out_put:
>   	if (ret)
>   		drm_mode_object_unregister(dev, &connector->base);
> @@ -479,10 +479,10 @@ void drm_connector_cleanup(struct drm_connector *connector)
>   	list_for_each_entry_safe(mode, t, &connector->modes, head)
>   		drm_mode_remove(connector, mode);
>   
> -	ida_simple_remove(&drm_connector_enum_list[connector->connector_type].ida,
> +	ida_free(&drm_connector_enum_list[connector->connector_type].ida,
>   			  connector->connector_type_id);

Hi,

Nitpick: the code should be aligned with "&drm_connector_enum_list" now

>   
> -	ida_simple_remove(&dev->mode_config.connector_ida,
> +	ida_free(&dev->mode_config.connector_ida,
>   			  connector->index);

Same here, but I guess that it fits one one line now.

>   
>   	kfree(connector->display_info.bus_formats);