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staging: greybus: fix get_channel_from_mode() failure path 

[ Upstream commit 34164202a5 ]

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: 2870b52bae ("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>
This commit is contained in:
Dan Carpenter 2024-03-04 10:04:48 +03:00 committed by Sasha Levin
parent e5969c54dd
commit 7fad138dcb
1 changed files with 4 additions and 4 deletions
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8
drivers/staging/greybus/light.c
View File

@ -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,