[PATCH 1/8] media: allegro: use 'time_left' variable with wait_for_completion_timeout()

From: Wolfram Sang
Date: Mon Jun 03 2024 - 05:29:10 EST


There is a confusing pattern in the kernel to use a variable named 'timeout' to
store the result of wait_for_completion_timeout() causing patterns like:

timeout = wait_for_completion_timeout(...)
if (!timeout) return -ETIMEDOUT;

with all kinds of permutations. Use 'time_left' as a variable to make the code
self explaining.

Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
.../media/platform/allegro-dvt/allegro-core.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c
index da61f9beb6b4..4016aef5fdb9 100644
--- a/drivers/media/platform/allegro-dvt/allegro-core.c
+++ b/drivers/media/platform/allegro-dvt/allegro-core.c
@@ -2481,14 +2481,14 @@ static void allegro_mcu_interrupt(struct allegro_dev *dev)
static void allegro_destroy_channel(struct allegro_channel *channel)
{
struct allegro_dev *dev = channel->dev;
- unsigned long timeout;
+ unsigned long time_left;

if (channel_exists(channel)) {
reinit_completion(&channel->completion);
allegro_mcu_send_destroy_channel(dev, channel);
- timeout = wait_for_completion_timeout(&channel->completion,
- msecs_to_jiffies(5000));
- if (timeout == 0)
+ time_left = wait_for_completion_timeout(&channel->completion,
+ msecs_to_jiffies(5000));
+ if (time_left == 0)
v4l2_warn(&dev->v4l2_dev,
"channel %d: timeout while destroying\n",
channel->mcu_channel_id);
@@ -2544,7 +2544,7 @@ static void allegro_destroy_channel(struct allegro_channel *channel)
static int allegro_create_channel(struct allegro_channel *channel)
{
struct allegro_dev *dev = channel->dev;
- unsigned long timeout;
+ unsigned long time_left;

if (channel_exists(channel)) {
v4l2_warn(&dev->v4l2_dev,
@@ -2595,9 +2595,9 @@ static int allegro_create_channel(struct allegro_channel *channel)

reinit_completion(&channel->completion);
allegro_mcu_send_create_channel(dev, channel);
- timeout = wait_for_completion_timeout(&channel->completion,
- msecs_to_jiffies(5000));
- if (timeout == 0)
+ time_left = wait_for_completion_timeout(&channel->completion,
+ msecs_to_jiffies(5000));
+ if (time_left == 0)
channel->error = -ETIMEDOUT;
if (channel->error)
goto err;
--
2.43.0