linux-kernel - Re: [PATCH 2/2] nvmem: core: append offset to cell name in sysfs

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Date:   Tue, 18 Jul 2023 16:44:09 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Daniel Golle <daniel@...rotopia.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] nvmem: core: append offset to cell name in sysfs

On Tue, Jul 18, 2023 at 02:55:57PM +0100, Daniel Golle wrote:
> The device tree node names are not required to be unique. Append the
> offset to the name to make cell nodes with identical names become
> accessible via sysfs and avoid kernel stackdump caused by
> sysfs: cannot create duplicate filename '...'
> 
> Fixes: 757f8b3835c9 ("nvmem: core: Expose cells through sysfs")
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---
>  drivers/nvmem/core.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
> index 70e951088826d..90fe9dc30f8ba 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -480,7 +480,9 @@ static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem)
>  	/* Initialize each attribute to take the name and size of the cell */
>  	list_for_each_entry(entry, &nvmem->cells, node) {
>  		sysfs_bin_attr_init(&attrs[i]);
> -		attrs[i].attr.name = devm_kstrdup(&nvmem->dev, entry->name, GFP_KERNEL);
> +		attrs[i].attr.name = devm_kasprintf(&nvmem->dev, GFP_KERNEL,
> +						    "%s@%d", entry->name,
> +						    entry->offset);

No documenatation update to show the new naming scheme?

And again, I don't see that git id in Linus's tree, am I just not up to
date properly?

thanks,

greg k-h