Re: [PATCH] staging: greybus: fix get_channel_from_mode() failure path

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On 3/4/24 3:17 AM, Rui Miguel Silva wrote:
Hi Dan,
once again thanks for the patch.

Dan Carpenter <dan.carpenter@xxxxxxxxxx> writes:

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@xxxxxxxxxx>

Reviewed-by: Rui Miguel Silva <rmfrfs@xxxxxxxxx>

Looks good.

Reviewed-by: Alex Elder <elder@xxxxxxxxxx>


Cheers,
   Rui

---
  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 d62f97249aca..a5c2fe963866 100644
--- a/drivers/staging/greybus/light.c
+++ b/drivers/staging/greybus/light.c
@@ -95,15 +95,15 @@ 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





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