linux-kernel - [PATCH] hwmon: (nct7904) Avoid fall-through warnings

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Date:   Thu, 6 Jun 2019 09:06:59 -0500
From:   "Gustavo A. R. Silva" <gustavo@...eddedor.com>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        "amy.shih" <amy.shih@...antech.com.tw>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH] hwmon: (nct7904) Avoid fall-through warnings

In preparation to enabling -Wimplicit-fallthrough, this patch silences
the following warnings:

drivers/hwmon/nct7904.c: In function 'nct7904_in_is_visible':
drivers/hwmon/nct7904.c:313:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (channel > 0 && (data->vsen_mask & BIT(index)))
      ^
drivers/hwmon/nct7904.c:315:2: note: here
  case hwmon_in_min:
  ^~~~
drivers/hwmon/nct7904.c: In function 'nct7904_fan_is_visible':
drivers/hwmon/nct7904.c:230:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (data->fanin_mask & (1 << channel))
      ^
drivers/hwmon/nct7904.c:232:2: note: here
  case hwmon_fan_min:
  ^~~~
drivers/hwmon/nct7904.c: In function 'nct7904_temp_is_visible':
drivers/hwmon/nct7904.c:443:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
   if (channel < 5) {
      ^
drivers/hwmon/nct7904.c:450:2: note: here
  case hwmon_temp_max:
  ^~~~

Warning level 3 was used: -Wimplicit-fallthrough=3

This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.

Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>
---
 drivers/hwmon/nct7904.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
index dd450dd29ac7..bf35dfd2d3a7 100644
--- a/drivers/hwmon/nct7904.c
+++ b/drivers/hwmon/nct7904.c
@@ -229,6 +229,7 @@ static umode_t nct7904_fan_is_visible(const void *_data, u32 attr, int channel)
 	case hwmon_fan_alarm:
 		if (data->fanin_mask & (1 << channel))
 			return 0444;
+		break;
 	case hwmon_fan_min:
 		if (data->fanin_mask & (1 << channel))
 			return 0644;
@@ -312,6 +313,7 @@ static umode_t nct7904_in_is_visible(const void *_data, u32 attr, int channel)
 	case hwmon_in_alarm:
 		if (channel > 0 && (data->vsen_mask & BIT(index)))
 			return 0444;
+		break;
 	case hwmon_in_min:
 	case hwmon_in_max:
 		if (channel > 0 && (data->vsen_mask & BIT(index)))
@@ -447,6 +449,7 @@ static umode_t nct7904_temp_is_visible(const void *_data, u32 attr, int channel)
 			if (data->has_dts & BIT(channel - 5))
 				return 0444;
 		}
+		break;
 	case hwmon_temp_max:
 	case hwmon_temp_max_hyst:
 	case hwmon_temp_emergency:
-- 
2.21.0