linux-kernel - [PATCH 2/9] i8k: Register only temperature sensors which have labels

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Date:	Mon, 12 Jan 2015 14:31:58 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Guenter Roeck <linux@...ck-us.net>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Steven Honeyman <stevenhoneyman@...il.com>,
	Jean Delvare <jdelvare@...e.de>,
	Gabriele Mazzotta <gabriele.mzt@...il.com>,
	Jochen Eisinger <jochen@...guin-breeder.org>,
	Valdis.Kletnieks@...edu, linux-kernel@...r.kernel.org,
	Pali Rohár <pali.rohar@...il.com>
Subject: [PATCH 2/9] i8k: Register only temperature sensors which have labels

Detect presense of sensor by calling type function instead trying to read
temperature value. Type function is working also for sensors which are temporary
turned off (e.g on GPU which is turned off). Dell DOS binary NBSVC.MDM is doing
similar checks, so we should do that too.

Signed-off-by: Pali Rohár <pali.rohar@...il.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Tested-by: Guenter Roeck <linux@...ck-us.net>
---
 drivers/char/i8k.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/char/i8k.c b/drivers/char/i8k.c
index 663868b..afcc9fe 100644
--- a/drivers/char/i8k.c
+++ b/drivers/char/i8k.c
@@ -660,19 +660,19 @@ static int __init i8k_init_hwmon(void)
 
 	i8k_hwmon_flags = 0;
 
-	/* CPU temperature attributes, if temperature reading is OK */
-	err = i8k_get_temp(0);
-	if (err >= 0 || err == -ERANGE)
+	/* CPU temperature attributes, if temperature type is OK */
+	err = i8k_get_temp_type(0);
+	if (err >= 0)
 		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP1;
 	/* check for additional temperature sensors */
-	err = i8k_get_temp(1);
-	if (err >= 0 || err == -ERANGE)
+	err = i8k_get_temp_type(1);
+	if (err >= 0)
 		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP2;
-	err = i8k_get_temp(2);
-	if (err >= 0 || err == -ERANGE)
+	err = i8k_get_temp_type(2);
+	if (err >= 0)
 		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP3;
-	err = i8k_get_temp(3);
-	if (err >= 0 || err == -ERANGE)
+	err = i8k_get_temp_type(3);
+	if (err >= 0)
 		i8k_hwmon_flags |= I8K_HWMON_HAVE_TEMP4;
 
 	/* Left fan attributes, if left fan is present */
-- 
1.7.9.5

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