linux-kernel - [PATCH] regmap: Add missing map->bus check

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Date:   Mon,  9 May 2022 02:30:35 +0200
From:   Marek Vasut <marex@...x.de>
To:     linux-kernel@...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>
Subject: [PATCH] regmap: Add missing map->bus check

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
---
 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 879a87a6461be..2221d98638317 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1839,7 +1839,7 @@ 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,
-- 
2.35.1