linux-kernel - [PATCH 2/8] nvmem: core: Fix of_nvmem_cell

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Message-Id: <20190106192820.12558-3-albeu@free.fr>
Date:   Sun,  6 Jan 2019 20:28:14 +0100
From:   Alban Bedel <albeu@...e.fr>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     linux-kernel@...r.kernel.org, Alban Bedel <albeu@...e.fr>
Subject: [PATCH 2/8] nvmem: core: Fix of_nvmem_cell_get() for optional cells

of_nvmem_cell_get() should return -ENOENT when a cell isn't defined,
otherwise callers can't distinguish between a missing cell and other
errors.

Signed-off-by: Alban Bedel <albeu@...e.fr>
---
 drivers/nvmem/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index cf2e1091fe89..f8c43da6f2ca 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -1031,7 +1031,7 @@ struct nvmem_cell *of_nvmem_cell_get(struct device_node *np, const char *id)
 
 	cell_np = of_parse_phandle(np, "nvmem-cells", index);
 	if (!cell_np)
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-ENOENT);
 
 	nvmem_np = of_get_next_parent(cell_np);
 	if (!nvmem_np)
-- 
2.19.1