linux-kernel - [PATCH 5.15 316/317] regmap: Add missing map->bus check

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Date: Sun, 24 Mar 2024 19:34:56 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Marek Vasut <marex@...x.de>,
	kernel test robot <lkp@...el.com>,
	Dan Carpenter <dan.carpenter@...cle.com>,
	Mark Brown <broonie@...nel.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 316/317] regmap: Add missing map->bus check

From: Marek Vasut <marex@...x.de>

[ Upstream commit 5c422f0b970d287efa864b8390a02face404db5d ]

The map->bus can be NULL here, add the missing NULL pointer check.

Fixes: d77e745613680 ("regmap: Add bulk read/write callbacks into regmap_config")
Reported-by: kernel test robot <lkp@...el.com>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Marek Vasut <marex@...x.de>
Cc: Dan Carpenter <dan.carpenter@...cle.com>
Cc: Mark Brown <broonie@...nel.org>
To: linux-kernel@...r.kernel.org
Link: https://lore.kernel.org/r/20220509003035.225272-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.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 6adb345866610..893b0615935e9 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1836,7 +1836,7 @@ static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
 				 map->format.reg_bytes +
 				 map->format.pad_bytes +
 				 val_len);
-	else if (map->bus->gather_write)
+	else if (map->bus && map->bus->gather_write)
 		ret = map->bus->gather_write(map->bus_context, map->work_buf,
 					     map->format.reg_bytes +
 					     map->format.pad_bytes,
-- 
2.43.0