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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Marc Kleine-Budde <mkl@pengutronix.de>,
        Mark Brown <broonie@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.19 08/19] regmap: dev_get_regmap_match(): fix string comparison
Date:   Mon, 20 Jul 2020 17:38:39 -0400
Message-Id: <20200720213851.407715-8-sashal@kernel.org>
In-Reply-To: <20200720213851.407715-1-sashal@kernel.org>
References: <20200720213851.407715-1-sashal@kernel.org>
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From: Marc Kleine-Budde <mkl@pengutronix.de>

[ Upstream commit e84861fec32dee8a2e62bbaa52cded6b05a2a456 ]

This function is used by dev_get_regmap() to retrieve a regmap for the
specified device. If the device has more than one regmap, the name parameter
can be used to specify one.

The code here uses a pointer comparison to check for equal strings. This
however will probably always fail, as the regmap->name is allocated via
kstrdup_const() from the regmap's config->name.

Fix this by using strcmp() instead.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20200703103315.267996-1-mkl@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/base/regmap/regmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c7d946b745efe..d26b485ccc7d0 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1343,7 +1343,7 @@ static int dev_get_regmap_match(struct device *dev, void *res, void *data)
 
 	/* If the user didn't specify a name match any */
 	if (data)
-		return (*r)->name == data;
+		return !strcmp((*r)->name, data);
 	else
 		return 1;
 }
-- 
2.25.1