linux-kernel - [PATCH 4/8] media: fimc-is: use 'time_left' variable with wait_event

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Message-ID: <20240603092841.9500-5-wsa+renesas@sang-engineering.com>
Date: Mon,  3 Jun 2024 11:28:35 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-kernel@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Alim Akhtar <alim.akhtar@...sung.com>,
	linux-media@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
Subject: [PATCH 4/8] media: fimc-is: use 'time_left' variable with wait_event_timeout()

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

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

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

Fix to the proper variable type 'long' while here.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 drivers/media/platform/samsung/exynos4-is/fimc-core.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-core.c b/drivers/media/platform/samsung/exynos4-is/fimc-core.c
index aae74b501a42..adfc2d73d04b 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-core.c
+++ b/drivers/media/platform/samsung/exynos4-is/fimc-core.c
@@ -822,7 +822,7 @@ static int fimc_clk_get(struct fimc_dev *fimc)
 static int fimc_m2m_suspend(struct fimc_dev *fimc)
 {
 	unsigned long flags;
-	int timeout;
+	long time_left;
 
 	spin_lock_irqsave(&fimc->slock, flags);
 	if (!fimc_m2m_pending(fimc)) {
@@ -833,12 +833,12 @@ static int fimc_m2m_suspend(struct fimc_dev *fimc)
 	set_bit(ST_M2M_SUSPENDING, &fimc->state);
 	spin_unlock_irqrestore(&fimc->slock, flags);
 
-	timeout = wait_event_timeout(fimc->irq_queue,
-			     test_bit(ST_M2M_SUSPENDED, &fimc->state),
-			     FIMC_SHUTDOWN_TIMEOUT);
+	time_left = wait_event_timeout(fimc->irq_queue,
+				       test_bit(ST_M2M_SUSPENDED, &fimc->state),
+				       FIMC_SHUTDOWN_TIMEOUT);
 
 	clear_bit(ST_M2M_SUSPENDING, &fimc->state);
-	return timeout == 0 ? -EAGAIN : 0;
+	return time_left == 0 ? -EAGAIN : 0;
 }
 
 static int fimc_m2m_resume(struct fimc_dev *fimc)
-- 
2.43.0