[PATCH V2] nvmem: core: fix nvmem_layout_get_match_data()

[PATCH V2] nvmem: core: fix nvmem_layout_get_match_data()

[Rafał Miłecki]

From: Rafał Miłecki <rafal@milecki.pl>

This function was trying to match wrong OF node (parent device's)
against an of_match_table. It was always returning NULL.

Make it match layout's OF node against layout's of_match_table.

Note: __maybe_unused is needed to avoid:
warning: variable 'layout_np' set but not used [-Wunused-but-set-variable]
(of_match_node() is no-op without CONFIG_OF).

Fixes: f5709a684a0a ("nvmem: core: introduce NVMEM layouts")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Michael Walle <michael@walle.cc>
---
 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 d112bb1328c1..d3be50ed2d0b 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -824,9 +824,11 @@ EXPORT_SYMBOL_GPL(of_nvmem_layout_get_container);
 const void *nvmem_layout_get_match_data(struct nvmem_device *nvmem,
 					struct nvmem_layout *layout)
 {
+	struct device_node __maybe_unused *layout_np;
 	const struct of_device_id *match;
 
-	match = of_match_node(layout->of_match_table, nvmem->dev.of_node);
+	layout_np = of_nvmem_layout_get_container(nvmem);
+	match = of_match_node(layout->of_match_table, layout_np);
 
 	return match ? match->data : NULL;
 }
-- 
2.34.1


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Re: [PATCH V2] nvmem: core: fix nvmem_layout_get_match_data()

[Srinivas Kandagatla]

On 10/01/2023 20:43, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> This function was trying to match wrong OF node (parent device's)
> against an of_match_table. It was always returning NULL.
> 
> Make it match layout's OF node against layout's of_match_table.
> 
> Note: __maybe_unused is needed to avoid:
> warning: variable 'layout_np' set but not used [-Wunused-but-set-variable]
> (of_match_node() is no-op without CONFIG_OF).
> 
> Fixes: f5709a684a0a ("nvmem: core: introduce NVMEM layouts")
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> Reviewed-by: Michael Walle <michael@walle.cc>

Applied thanks,

--srini
> ---
>   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 d112bb1328c1..d3be50ed2d0b 100644
> --- a/drivers/nvmem/core.c
> +++ b/drivers/nvmem/core.c
> @@ -824,9 +824,11 @@ EXPORT_SYMBOL_GPL(of_nvmem_layout_get_container);
>   const void *nvmem_layout_get_match_data(struct nvmem_device *nvmem,
>   					struct nvmem_layout *layout)
>   {
> +	struct device_node __maybe_unused *layout_np;
>   	const struct of_device_id *match;
>   
> -	match = of_match_node(layout->of_match_table, nvmem->dev.of_node);
> +	layout_np = of_nvmem_layout_get_container(nvmem);
> +	match = of_match_node(layout->of_match_table, layout_np);
>   
>   	return match ? match->data : NULL;
>   }

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