linux-kernel - [PATCH v11 5/9] ACPI: x86: s2idle: Store if constraint is enabled

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: <20230809185453.40916-6-mario.limonciello@amd.com>
Date:   Wed, 9 Aug 2023 13:54:49 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Bjorn Helgaas <helgaas@...nel.org>
CC:     <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>,
        <linux-acpi@...r.kernel.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Iain Lane" <iain@...ngesquash.org.uk>,
        Shyam-sundar S-k <Shyam-sundar.S-k@....com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH v11 5/9] ACPI: x86: s2idle: Store if constraint is enabled

Constraints are currently only stored when enabled.  To enable
the ability to check if constraints are present they need to be
stored even if disabled.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v9->v10:
 * split from other patches
---
 drivers/acpi/x86/s2idle.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/x86/s2idle.c b/drivers/acpi/x86/s2idle.c
index 91cd6f8b8ade0..0c8101acc92ef 100644
--- a/drivers/acpi/x86/s2idle.c
+++ b/drivers/acpi/x86/s2idle.c
@@ -78,6 +78,7 @@ struct lpi_device_constraint {
 struct lpi_constraints {
 	acpi_handle handle;
 	int min_dstate;
+	bool enabled;
 };
 
 /* AMD Constraint package structure */
@@ -151,8 +152,7 @@ static void lpi_device_get_constraints_amd(void)
 					}
 				}
 
-				if (!dev_info.enabled || !dev_info.name ||
-				    !dev_info.min_dstate)
+				if (!dev_info.name)
 					continue;
 
 				status = acpi_get_handle(NULL, dev_info.name, &list->handle);
@@ -173,6 +173,7 @@ static void lpi_device_get_constraints_amd(void)
 							  "Incomplete constraint defined\n");
 					continue;
 				}
+				list->enabled = dev_info.enabled;
 				lpi_constraints_table_size++;
 			}
 		}
@@ -235,7 +236,7 @@ static void lpi_device_get_constraints(void)
 			}
 		}
 
-		if (!info.enabled || !info.package || !info.name)
+		if (!info.package || !info.name)
 			continue;
 
 		constraint = &lpi_constraints_table[lpi_constraints_table_size];
@@ -247,7 +248,7 @@ static void lpi_device_get_constraints(void)
 		acpi_handle_debug(lps0_device_handle,
 				  "index:%d Name:%s\n", i, info.name);
 
-		constraint->min_dstate = -1;
+		constraint->min_dstate = -EINVAL;
 
 		for (j = 0; j < package_count; ++j) {
 			union acpi_object *info_obj = &info.package[j];
@@ -284,7 +285,7 @@ static void lpi_device_get_constraints(void)
 					  "Incomplete constraint defined\n");
 			continue;
 		}
-
+		constraint->enabled = info.enabled;
 		lpi_constraints_table_size++;
 	}
 
-- 
2.34.1