linux-kernel - [RFC v3 2/4] platform/x86/intel/pmc: core: Drop check

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]

Date:   Tue, 15 Nov 2022 14:01:54 -0600
From:   Mario Limonciello <mario.limonciello@....com>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        David E Box <david.e.box@...el.com>
CC:     Sven van Ashbrook <svenva@...omium.org>,
        Raul Rangel <rrangel@...omium.org>, <linux-pm@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>, Pavel Machek <pavel@....cz>,
        Len Brown <len.brown@...el.com>,
        John Stultz <jstultz@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        S-k Shyam-sundar <Shyam-sundar.S-k@....com>,
        Rajat Jain <rajatja@...gle.com>,
        Hans de Goede <hdegoede@...hat.com>,
        <linux-kernel@...r.kernel.org>
Subject: [RFC v3 2/4] platform/x86/intel/pmc: core: Drop check_counters

`check_counters` is a stateful variable for indicating whether or
not to be checking if counters incremented on resume from s2idle.

As the module already has code to gate whether to check the counters
that will fail the suspend when this is enabled, use that instead.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
RFC v2->v3:
 * New patch
---
 drivers/platform/x86/intel/pmc/core.c | 7 ++-----
 drivers/platform/x86/intel/pmc/core.h | 1 -
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c
index 17ec5825d13d..adc2cae4db28 100644
--- a/drivers/platform/x86/intel/pmc/core.c
+++ b/drivers/platform/x86/intel/pmc/core.c
@@ -2059,8 +2059,6 @@ static __maybe_unused int pmc_core_suspend(struct device *dev)
 {
 	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
 
-	pmcdev->check_counters = false;
-
 	/* No warnings on S0ix failures */
 	if (!warn_on_s0ix_failures)
 		return 0;
@@ -2077,7 +2075,6 @@ static __maybe_unused int pmc_core_suspend(struct device *dev)
 	if (pmc_core_dev_state_get(pmcdev, &pmcdev->s0ix_counter))
 		return -EIO;
 
-	pmcdev->check_counters = true;
 	return 0;
 }
 
@@ -2113,10 +2110,10 @@ static __maybe_unused int pmc_core_resume(struct device *dev)
 	const struct pmc_bit_map **maps = pmcdev->map->lpm_sts;
 	int offset = pmcdev->map->lpm_status_offset;
 
-	if (!pmcdev->check_counters)
+	if (!pmc_core_is_s0ix_failed(pmcdev))
 		return 0;
 
-	if (!pmc_core_is_s0ix_failed(pmcdev))
+	if (!warn_on_s0ix_failures)
 		return 0;
 
 	if (pmc_core_is_pc10_failed(pmcdev)) {
diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h
index 7a059e02c265..5687e91e884c 100644
--- a/drivers/platform/x86/intel/pmc/core.h
+++ b/drivers/platform/x86/intel/pmc/core.h
@@ -316,7 +316,6 @@ struct pmc_reg_map {
  * @pmc_xram_read_bit:	flag to indicate whether PMC XRAM shadow registers
  *			used to read MPHY PG and PLL status are available
  * @mutex_lock:		mutex to complete one transcation
- * @check_counters:	On resume, check if counters are getting incremented
  * @pc10_counter:	PC10 residency counter
  * @s0ix_counter:	S0ix residency (step adjusted)
  * @num_lpm_modes:	Count of enabled modes
-- 
2.34.1