From:   Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To:     gregkh@linuxfoundation.org
Cc:     linux-kernel@vger.kernel.org,
        =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>,
        Michael Walle <michael@walle.cc>,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Subject: [PATCH 30/37] nvmem: core: fix nvmem_layout_get_match_data()
Date:   Fri, 27 Jan 2023 11:15:58 +0000
Message-Id: <20230127111605.25958-31-srinivas.kandagatla@linaro.org>
In-Reply-To: <20230127111605.25958-1-srinivas.kandagatla@linaro.org>
References: <20230127111605.25958-1-srinivas.kandagatla@linaro.org>
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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: f61a093b4a0e ("nvmem: core: introduce NVMEM layouts")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Michael Walle <michael@walle.cc>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.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 30057b0094a2..38a5728bc65c 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;
 }
-- 
2.25.1