linux-kernel - [PATCH 3/6] wifi: mac80211: use 'time_left' variable with wait_for_completion

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Date: Mon,  3 Jun 2024 11:15:36 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: linux-kernel@...r.kernel.org
Cc: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Kalle Valo <kvalo@...nel.org>,
	linux-wireless@...r.kernel.org
Subject: [PATCH 3/6] wifi: mac80211: use 'time_left' variable with wait_for_completion_timeout()

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@...g-engineering.com>
---
 drivers/net/wireless/marvell/mwl8k.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wireless/marvell/mwl8k.c b/drivers/net/wireless/marvell/mwl8k.c
index d3d07bb26335..241a02a0accd 100644
--- a/drivers/net/wireless/marvell/mwl8k.c
+++ b/drivers/net/wireless/marvell/mwl8k.c
@@ -2211,7 +2211,7 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt_hdr *cmd
 	dma_addr_t dma_addr;
 	unsigned int dma_size;
 	int rc;
-	unsigned long timeout = 0;
+	unsigned long time_left = 0;
 	u8 buf[32];
 	u32 bitmap = 0;
 
@@ -2258,8 +2258,8 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt_hdr *cmd
 	iowrite32(MWL8K_H2A_INT_DUMMY,
 		regs + MWL8K_HIU_H2A_INTERRUPT_EVENTS);
 
-	timeout = wait_for_completion_timeout(&cmd_wait,
-				msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
+	time_left = wait_for_completion_timeout(&cmd_wait,
+						msecs_to_jiffies(MWL8K_CMD_TIMEOUT_MS));
 
 	priv->hostcmd_wait = NULL;
 
@@ -2267,7 +2267,7 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt_hdr *cmd
 	dma_unmap_single(&priv->pdev->dev, dma_addr, dma_size,
 			 DMA_BIDIRECTIONAL);
 
-	if (!timeout) {
+	if (!time_left) {
 		wiphy_err(hw->wiphy, "Command %s timeout after %u ms\n",
 			  mwl8k_cmd_name(cmd->code, buf, sizeof(buf)),
 			  MWL8K_CMD_TIMEOUT_MS);
@@ -2275,7 +2275,7 @@ static int mwl8k_post_cmd(struct ieee80211_hw *hw, struct mwl8k_cmd_pkt_hdr *cmd
 	} else {
 		int ms;
 
-		ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(timeout);
+		ms = MWL8K_CMD_TIMEOUT_MS - jiffies_to_msecs(time_left);
 
 		rc = cmd->result ? -EINVAL : 0;
 		if (rc)
-- 
2.43.0