[PATCH 4.19 045/264] media: m5mols: Check function pointer in m5mols_sensor_power

From: Greg Kroah-Hartman
Date: Tue Oct 27 2020 - 10:21:37 EST


From: Tom Rix <trix@xxxxxxxxxx>

[ Upstream commit 52438c4463ac904d14bf3496765e67750766f3a6 ]

clang static analysis reports this error

m5mols_core.c:767:4: warning: Called function pointer
is null (null dereference) [core.CallAndMessage]
info->set_power(&client->dev, 0);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

In other places, the set_power ptr is checked.
So add a check.

Fixes: bc125106f8af ("[media] Add support for M-5MOLS 8 Mega Pixel camera ISP")
Signed-off-by: Tom Rix <trix@xxxxxxxxxx>
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/media/i2c/m5mols/m5mols_core.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/m5mols/m5mols_core.c b/drivers/media/i2c/m5mols/m5mols_core.c
index 12e79f9e32d53..d9a9644306096 100644
--- a/drivers/media/i2c/m5mols/m5mols_core.c
+++ b/drivers/media/i2c/m5mols/m5mols_core.c
@@ -768,7 +768,8 @@ static int m5mols_sensor_power(struct m5mols_info *info, bool enable)

ret = regulator_bulk_enable(ARRAY_SIZE(supplies), supplies);
if (ret) {
- info->set_power(&client->dev, 0);
+ if (info->set_power)
+ info->set_power(&client->dev, 0);
return ret;
}

--
2.25.1