Re: [PATCH 2/4] platform/x86: wmi-bmof: Switch to sysfs_bin_attr_simple_read()

[Armin Wolf <W_Armin@gmx.de>]

Am 05.12.24 um 18:35 schrieb Thomas Weißschuh:

> The generic function from the sysfs core can replace the custom one.

Sorry for taking quite a bit to respond, i totally overlooked this patch.

This patch is superseded by a patch of mine: https://lore.kernel.org/platform-driver-x86/20241206215650.2977-1-W_Armin@gmx.de/

This reworks the binary attribute handling inside the driver to use the new .bin_size() callback. This allows the
driver to have a static binary attribute which does not need a memory allocation.

Because i think we cannot use sysfs_bin_attr_simple_read() anymore. So maybe you can just drop this patch?

Thanks,
Armin Wolf

> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
> ---
>   drivers/platform/x86/wmi-bmof.c | 12 ++----------
>   1 file changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/platform/x86/wmi-bmof.c b/drivers/platform/x86/wmi-bmof.c
> index df6f0ae6e6c7904f97c125297a21166f56d0b1f0..e6c217d70086a2896dc70cf8ac1c27dafb501a95 100644
> --- a/drivers/platform/x86/wmi-bmof.c
> +++ b/drivers/platform/x86/wmi-bmof.c
> @@ -25,15 +25,6 @@ struct bmof_priv {
>   	struct bin_attribute bmof_bin_attr;
>   };
>
> -static ssize_t read_bmof(struct file *filp, struct kobject *kobj, struct bin_attribute *attr,
> -			 char *buf, loff_t off, size_t count)
> -{
> -	struct bmof_priv *priv = container_of(attr, struct bmof_priv, bmof_bin_attr);
> -
> -	return memory_read_from_buffer(buf, count, &off, priv->bmofdata->buffer.pointer,
> -				       priv->bmofdata->buffer.length);
> -}
> -
>   static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
>   {
>   	struct bmof_priv *priv;
> @@ -60,7 +51,8 @@ static int wmi_bmof_probe(struct wmi_device *wdev, const void *context)
>   	sysfs_bin_attr_init(&priv->bmof_bin_attr);
>   	priv->bmof_bin_attr.attr.name = "bmof";
>   	priv->bmof_bin_attr.attr.mode = 0400;
> -	priv->bmof_bin_attr.read = read_bmof;
> +	priv->bmof_bin_attr.read_new = sysfs_bin_attr_simple_read;
> +	priv->bmof_bin_attr.private = priv->bmofdata->buffer.pointer;
>   	priv->bmof_bin_attr.size = priv->bmofdata->buffer.length;
>
>   	ret = device_create_bin_file(&wdev->dev, &priv->bmof_bin_attr);
>