linux-kernel - [PATCH 3.12 26/98] hwmon: (coretemp) Increase limit of maximum core ID from 32 to 128.

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Date:	Mon, 11 Apr 2016 15:22:28 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Lukasz Odzioba <lukasz.odzioba@...el.com>,
	Guenter Roeck <linux@...ck-us.net>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 26/98] hwmon: (coretemp) Increase limit of maximum core ID from 32 to 128.

From: Lukasz Odzioba <lukasz.odzioba@...el.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit cc904f9cf26dc455cffbdf6e7eb86717e047d8ff upstream.

A new limit selected arbitrarily as power of two greater than
required minimum for Xeon Phi processor (72 for Knights Landing).

Currently driver is not able to handle cores with core ID greater than 32.
Such attempt ends up with the following error in dmesg:
coretemp coretemp.0: Adding Core XXX failed

Signed-off-by: Lukasz Odzioba <lukasz.odzioba@...el.com>
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/hwmon/coretemp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 942509892895..bf5722d31f40 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -51,7 +51,7 @@ module_param_named(tjmax, force_tjmax, int, 0444);
 MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius");
 
 #define BASE_SYSFS_ATTR_NO	2	/* Sysfs Base attr no for coretemp */
-#define NUM_REAL_CORES		32	/* Number of Real cores per cpu */
+#define NUM_REAL_CORES		128	/* Number of Real cores per cpu */
 #define CORETEMP_NAME_LENGTH	19	/* String Length of attrs */
 #define MAX_CORE_ATTRS		4	/* Maximum no of basic attrs */
 #define TOTAL_ATTRS		(MAX_CORE_ATTRS + 1)
-- 
2.8.1