linux-kernel - [PATCH 5.13 026/127] mtd: rawnand: Add a check in of_get_nand_secure

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Date:   Tue, 24 Aug 2021 12:54:26 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 026/127] mtd: rawnand: Add a check in of_get_nand_secure_regions()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 14f97f0b8e2b9950c028d0cb7311ffe26a3cc1c0 ]

Check for whether of_property_count_elems_of_size() returns a negative
error code.

Fixes: 13b89768275d ("mtd: rawnand: Add support for secure regions in NAND memory")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Manivannan Sadhasivam <mani@...nel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
Link: https://lore.kernel.org/linux-mtd/YMtQFXE0F1w7mUh+@mwanda
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/mtd/nand/raw/nand_base.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index fb072c444495..b18c089a7dca 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5059,8 +5059,8 @@ static int of_get_nand_secure_regions(struct nand_chip *chip)
 	int nr_elem, i, j;
 
 	nr_elem = of_property_count_elems_of_size(dn, "secure-regions", sizeof(u64));
-	if (!nr_elem)
-		return 0;
+	if (nr_elem <= 0)
+		return nr_elem;
 
 	chip->nr_secure_regions = nr_elem / 2;
 	chip->secure_regions = kcalloc(chip->nr_secure_regions, sizeof(*chip->secure_regions),
-- 
2.30.2