linux-kernel - [PATCH 13/15] i2c: rk3x: use 'time_left' variable with wait_event

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Message-ID: <20240427203611.3750-14-wsa+renesas@sang-engineering.com>
Date: Sat, 27 Apr 2024 22:36:05 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-i2c@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Andi Shyti <andi.shyti@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 13/15] i2c: rk3x: 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/i2c/busses/i2c-rk3x.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
index 8c7367f289d3..beca61700c89 100644
--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -1060,7 +1060,8 @@ static int rk3x_i2c_xfer_common(struct i2c_adapter *adap,
 				struct i2c_msg *msgs, int num, bool polling)
 {
 	struct rk3x_i2c *i2c = (struct rk3x_i2c *)adap->algo_data;
-	unsigned long timeout, flags;
+	unsigned long flags;
+	long time_left;
 	u32 val;
 	int ret = 0;
 	int i;
@@ -1092,20 +1093,20 @@ static int rk3x_i2c_xfer_common(struct i2c_adapter *adap,
 		if (!polling) {
 			rk3x_i2c_start(i2c);
 
-			timeout = wait_event_timeout(i2c->wait, !i2c->busy,
-						     msecs_to_jiffies(WAIT_TIMEOUT));
+			time_left = wait_event_timeout(i2c->wait, !i2c->busy,
+						       msecs_to_jiffies(WAIT_TIMEOUT));
 		} else {
 			disable_irq(i2c->irq);
 			rk3x_i2c_start(i2c);
 
-			timeout = rk3x_i2c_wait_xfer_poll(i2c);
+			time_left = rk3x_i2c_wait_xfer_poll(i2c);
 
 			enable_irq(i2c->irq);
 		}
 
 		spin_lock_irqsave(&i2c->lock, flags);
 
-		if (timeout == 0) {
+		if (time_left == 0) {
 			/* Force a STOP condition without interrupt */
 			i2c_writel(i2c, 0, REG_IEN);
 			val = i2c_readl(i2c, REG_CON) & REG_CON_TUNING_MASK;
-- 
2.43.0