linux-kernel - [RFT][PATCH 2/2] ACPI: PM: Loop in full LPS0 mode only

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:   Mon, 17 Dec 2018 12:22:43 +0100
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [RFT][PATCH 2/2] ACPI: PM: Loop in full LPS0 mode only

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

After a previous change, all non-wakeup GPEs are disabled for
suspend-to-idle unless full Low-Power S0 (LPS0) mode is in use, so
it is not necessary to do anything in acpi_s2idle_wake() unless in
full LPS0 mode, which is when lps0_device_handle is set only.

Modify the code accordingly.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/sleep.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-pm/drivers/acpi/sleep.c
===================================================================
--- linux-pm.orig/drivers/acpi/sleep.c
+++ linux-pm/drivers/acpi/sleep.c
@@ -985,6 +985,8 @@ static int acpi_s2idle_prepare(void)
 
 static void acpi_s2idle_wake(void)
 {
+	if (!lps0_device_handle)
+		return;
 
 	if (pm_debug_messages_on)
 		lpi_check_constraints();
@@ -1003,8 +1005,7 @@ static void acpi_s2idle_wake(void)
 		 * takes too much time for EC wakeup events to survive, so look
 		 * for them now.
 		 */
-		if (lps0_device_handle)
-			acpi_ec_dispatch_gpe();
+		acpi_ec_dispatch_gpe();
 	}
 }