[PATCH 6.8 630/715] staging: greybus: fix get_channel_from_mode() failure path

Sasha Levin
2024-03-24T22:45:23Z

From: Dan Carpenter <dan.carpenter@linaro.org>

[ Upstream commit 34164202a5827f60a203ca9acaf2d9f7d432aac8 ]

The get_channel_from_mode() function is supposed to return the channel
which matches the mode. But it has a bug where if it doesn't find a
matching channel then it returns the last channel. It should return
NULL instead.

Also remove an unnecessary NULL check on "channel".

Fixes: 2870b52bae4c ("greybus: lights: add lights implementation")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/379c0cb4-39e0-4293-8a18-c7b1298e5420@moroto.mountain
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/staging/greybus/light.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/greybus/light.c b/drivers/staging/greybus/light.c
index 87d36948c6106..c6bd86a5335ab 100644
--- a/drivers/staging/greybus/light.c
+++ b/drivers/staging/greybus/light.c
@@ -100,15 +100,15 @@ static struct led_classdev *get_channel_cdev(struct gb_channel *channel)
static struct gb_channel *get_channel_from_mode(struct gb_light *light,
u32 mode)
{
- struct gb_channel *channel = NULL;
+ struct gb_channel *channel;
int i;

for (i = 0; i < light->channels_count; i++) {
channel = &light->channels[i];
- if (channel && channel->mode == mode)
- break;
+ if (channel->mode == mode)
+ return channel;
}
- return channel;
+ return NULL;
}

static int __gb_lights_flash_intensity_set(struct gb_channel *channel,
--
2.43.0