linux-kernel - [PATCH v3 02/10] platform/x86: alienware-wmi-wmax: Refactor is_awcc_thermal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250305-hwm-v3-2-395e7a1407e2@gmail.com>
Date: Wed, 05 Mar 2025 19:56:53 -0500
From: Kurt Borja <kuurtb@...il.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Armin Wolf <W_Armin@....de>
Cc: Kurt Borja <kuurtb@...il.com>, Hans de Goede <hdegoede@...hat.com>, 
 platform-driver-x86@...r.kernel.org, Dell.Client.Kernel@...l.com, 
 linux-kernel@...r.kernel.org
Subject: [PATCH v3 02/10] platform/x86: alienware-wmi-wmax: Refactor
 is_awcc_thermal_mode()

Refactor is_awcc_thermal_mode() to use FIELD_GET() instead of bitwise
operations. Drop the check for BIT(8) sensor flag and rename it to
is_awcc_thermal_profile_id().

Reviewed-by: Armin Wolf <W_Armin@....de>
Signed-off-by: Kurt Borja <kuurtb@...il.com>
---
 drivers/platform/x86/dell/alienware-wmi-wmax.c | 33 +++++++++++++-------------
 1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c
index ed70e12d73d7fe5d89f3364c5367820bf47e3c1e..80aefba5b22d6b4ac18aeb2ca356f8c911150abd 100644
--- a/drivers/platform/x86/dell/alienware-wmi-wmax.c
+++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c
@@ -34,7 +34,8 @@
 #define AWCC_FAILURE_CODE			0xFFFFFFFF
 #define AWCC_THERMAL_TABLE_MASK			GENMASK(7, 4)
 #define AWCC_THERMAL_MODE_MASK			GENMASK(3, 0)
-#define AWCC_SENSOR_ID_MASK			BIT(8)
+/* Some IDs have a BIT(8) flag that we ignore */
+#define AWCC_RESOURCE_ID_MASK			GENMASK(7, 0)
 
 static bool force_platform_profile;
 module_param_unsafe(force_platform_profile, bool, 0);
@@ -168,8 +169,8 @@ enum AWCC_GAME_SHIFT_STATUS_OPERATIONS {
 };
 
 enum AWCC_THERMAL_TABLES {
-	AWCC_THERMAL_TABLE_LEGACY		= 0x90,
-	AWCC_THERMAL_TABLE_USTT			= 0xA0,
+	AWCC_THERMAL_TABLE_LEGACY		= 0x9,
+	AWCC_THERMAL_TABLE_USTT			= 0xA,
 };
 
 enum awcc_thermal_profile {
@@ -445,20 +446,18 @@ const struct attribute_group wmax_deepsleep_attribute_group = {
  * Thermal Profile control
  *  - Provides thermal profile control through the Platform Profile API
  */
-static bool is_awcc_thermal_mode(u32 code)
+static bool is_awcc_thermal_profile_id(u8 code)
 {
-	if (code & AWCC_SENSOR_ID_MASK)
+	u8 table = FIELD_GET(AWCC_THERMAL_TABLE_MASK, code);
+	u8 mode = FIELD_GET(AWCC_THERMAL_MODE_MASK, code);
+
+	if (mode >= AWCC_PROFILE_LAST)
 		return false;
 
-	if ((code & AWCC_THERMAL_MODE_MASK) >= AWCC_PROFILE_LAST)
-		return false;
-
-	if ((code & AWCC_THERMAL_TABLE_MASK) == AWCC_THERMAL_TABLE_LEGACY &&
-	    (code & AWCC_THERMAL_MODE_MASK) >= AWCC_PROFILE_LEGACY_QUIET)
+	if (table == AWCC_THERMAL_TABLE_LEGACY && mode >= AWCC_PROFILE_LEGACY_QUIET)
 		return true;
 
-	if ((code & AWCC_THERMAL_TABLE_MASK) == AWCC_THERMAL_TABLE_USTT &&
-	    (code & AWCC_THERMAL_MODE_MASK) <= AWCC_PROFILE_USTT_LOW_POWER)
+	if (table == AWCC_THERMAL_TABLE_USTT && mode <= AWCC_PROFILE_USTT_LOW_POWER)
 		return true;
 
 	return false;
@@ -548,7 +547,7 @@ static int awcc_platform_profile_get(struct device *dev,
 		return 0;
 	}
 
-	if (!is_awcc_thermal_mode(out_data))
+	if (!is_awcc_thermal_profile_id(out_data))
 		return -ENODATA;
 
 	out_data &= AWCC_THERMAL_MODE_MASK;
@@ -597,6 +596,7 @@ static int awcc_platform_profile_probe(void *drvdata, unsigned long *choices)
 	u32 first_mode;
 	u32 out_data;
 	int ret;
+	u8 id;
 
 	ret = awcc_thermal_information(priv->wdev, AWCC_OP_GET_SYSTEM_DESCRIPTION,
 				       0, (u32 *) &sys_desc);
@@ -615,12 +615,13 @@ static int awcc_platform_profile_probe(void *drvdata, unsigned long *choices)
 		if (ret == -EBADRQC)
 			break;
 
-		if (!is_awcc_thermal_mode(out_data))
+		id = FIELD_GET(AWCC_RESOURCE_ID_MASK, out_data);
+		if (!is_awcc_thermal_profile_id(id))
 			continue;
 
-		mode = out_data & AWCC_THERMAL_MODE_MASK;
+		mode = FIELD_GET(AWCC_THERMAL_MODE_MASK, id);
 		profile = awcc_mode_to_platform_profile[mode];
-		priv->supported_thermal_profiles[profile] = out_data;
+		priv->supported_thermal_profiles[profile] = id;
 
 		set_bit(profile, choices);
 	}

-- 
2.48.1