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From: Javier Carrasco <javier.carrasco.cruz@gmail.com>
To: Guenter Roeck <linux@roeck-us.net>
Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org,
	 Javier Carrasco <javier.carrasco.cruz@gmail.com>
Subject: [PATCH v3 02/11] hwmon: chipcap2: fix off-by-one in command mode retry loop
Date: Wed, 14 Oct 2026 19:34:01 +0200	[thread overview]
Message-ID: <20261014-chipcap2_locks-v3-2-27ebfc2c5b9e@gmail.com> (raw)
In-Reply-To: <20261014-chipcap2_locks-v3-0-27ebfc2c5b9e@gmail.com>

i == CC2_CM_RETRIES can never be true inside the loop, since it
only runs while i < CC2_CM_RETRIES. Use CC2_CM_RETRIES - 1 so the
last failed retry breaks out immediately instead of doing a useless
disable + 80 ms power-cycle delay before the loop condition ends it
anyway.

Fixes: 3af350929e75 ("hwmon: Add support for Amphenol ChipCap 2")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
---
 drivers/hwmon/chipcap2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/chipcap2.c b/drivers/hwmon/chipcap2.c
index 855057892852..8102b6851d3d 100644
--- a/drivers/hwmon/chipcap2.c
+++ b/drivers/hwmon/chipcap2.c
@@ -226,7 +226,7 @@ static int cc2_command_mode_start(struct cc2_data *data)
 				     2 * CC2_RESP_START_CM_US);
 		}
 		ret = cc2_read_command_status(data->client);
-		if (ret != -ETIMEDOUT || i == CC2_CM_RETRIES)
+		if (ret != -ETIMEDOUT || i == CC2_CM_RETRIES - 1)
 			break;
 
 		/* command window missed, prepare for a retry */

-- 
2.43.0


  parent reply	other threads:[~2026-10-14 17:34 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-14 17:33 [PATCH v3 00/11] hwmon: chipcap2: various bug fixes Javier Carrasco
2026-10-14 17:34 ` [PATCH v3 01/11] hwmon: chipcap2: fix command error diagnostics Javier Carrasco
2026-10-14 17:50   ` sashiko-bot
2026-10-14 17:34 ` Javier Carrasco [this message]
2026-10-14 18:01   ` [PATCH v3 02/11] hwmon: chipcap2: fix off-by-one in command mode retry loop sashiko-bot
2026-10-14 20:11     ` Javier Carrasco
2026-10-14 17:34 ` [PATCH v3 03/11] hwmon: chipcap2: fix be16 handling Javier Carrasco
2026-10-14 18:08   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 04/11] hwmon: chipcap2: defer probe when IRQs are unavailable Javier Carrasco
2026-10-14 18:14   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 05/11] hwmon: chipcap2: fix IRQ teardown ordering Javier Carrasco
2026-10-14 18:22   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 06/11] hwmon: chipcap2: disable device after hwmon teardown Javier Carrasco
2026-10-14 18:34   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 07/11] hwmon: chipcap2: enable IRQ processing when regulator is already enabled Javier Carrasco
2026-10-14 18:36   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 08/11] hwmon: chipcap2: balance regulator state Javier Carrasco
2026-10-14 18:38   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 09/11] hwmon: chipcap2: do not discard pending alarms on disable Javier Carrasco
2026-10-14 18:38   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 10/11] hwmon: chipcap2: serialize access to the alarm indicators Javier Carrasco
2026-10-14 18:35   ` sashiko-bot
2026-10-14 17:34 ` [PATCH v3 11/11] hwmon: chipcap2: synchronize ready IRQ state Javier Carrasco
2026-10-14 18:41   ` sashiko-bot

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