linux-kernel - Re: [PATCH] misc/genalloc: Name subpools by of_node_full

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Message-ID: <a8d2bde9-174c-afed-f0e5-ed1ed2d1df0d@gmail.com>
Date:   Thu, 22 Jun 2023 14:38:48 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] misc/genalloc: Name subpools by of_node_full_name()

22.06.2023 10:45, Linus Walleij пишет:
> A previous commit tried to come up with more generic subpool
> names, but this isn't quite working: the node name was used
> elsewhere to match pools to consumers which regressed the
> nVidia Tegra 2/3 video decoder.
> 
> Revert back to an earlier approach using of_node_full_name()
> instead of just the name to make sure the pool name is more
> unique, and change both sites using this in the kernel.
> 
> It is not perfect since two SRAM nodes could have the same
> subpool name but it makes the situation better than before.
> 
> Reported-by: Dmitry Osipenko <digetx@...il.com>
> Fixes: 21e5a2d10c8f ("misc: sram: Generate unique names for subpools")
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  drivers/misc/sram.c | 2 +-
>  lib/genalloc.c      | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
> index 5757adf418b1..61209739dc43 100644
> --- a/drivers/misc/sram.c
> +++ b/drivers/misc/sram.c
> @@ -236,7 +236,7 @@ static int sram_reserve_regions(struct sram_dev *sram, struct resource *res)
>  			}
>  			if (!label)
>  				block->label = devm_kasprintf(sram->dev, GFP_KERNEL,
> -							      "%s", dev_name(sram->dev));
> +							      "%s", of_node_full_name(child));
>  			else
>  				block->label = devm_kstrdup(sram->dev,
>  							    label, GFP_KERNEL);
> diff --git a/lib/genalloc.c b/lib/genalloc.c
> index 0c883d6fbd44..6c644f954bc5 100644
> --- a/lib/genalloc.c
> +++ b/lib/genalloc.c
> @@ -895,7 +895,7 @@ struct gen_pool *of_gen_pool_get(struct device_node *np,
>  
>  		of_property_read_string(np_pool, "label", &name);
>  		if (!name)
> -			name = np_pool->name;
> +			name = of_node_full_name(np_pool);
>  	}
>  	if (pdev)
>  		pool = gen_pool_get(&pdev->dev, name);

Works great, thanks!

Tested-by: Dmitry Osipenko <digetx@...il.com>