linux-kernel - [PATCH 1/2] phy: core: Add phy_pm_runtime

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: <20181117133755.9129-2-tony@atomide.com>
Date:   Sat, 17 Nov 2018 05:37:54 -0800
From:   Tony Lindgren <tony@...mide.com>
To:     Kishon Vijay Abraham I <kishon@...com>
Cc:     linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-omap@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Sebastian Reichel <sre@...nel.org>
Subject: [PATCH 1/2] phy: core: Add phy_pm_runtime_enabled

The phy driver may need to check phy_pm_runtime_enabled() in suspend as
PM runtime for phy may be already disabled when phy power_off() is called.

Cc: Pavel Machek <pavel@....cz>
Cc: Sebastian Reichel <sre@...nel.org>
Signed-off-by: Tony Lindgren <tony@...mide.com>
---
 drivers/phy/phy-core.c  | 9 +++++++++
 include/linux/phy/phy.h | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
--- a/drivers/phy/phy-core.c
+++ b/drivers/phy/phy-core.c
@@ -209,6 +209,15 @@ int phy_pm_runtime_put_sync(struct phy *phy)
 }
 EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync);
 
+bool phy_pm_runtime_enabled(struct phy *phy)
+{
+	if (!phy)
+		return false;
+
+	return pm_runtime_enabled(&phy->dev);
+}
+EXPORT_SYMBOL_GPL(phy_pm_runtime_enabled);
+
 void phy_pm_runtime_allow(struct phy *phy)
 {
 	if (!phy)
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -158,6 +158,7 @@ int phy_pm_runtime_get(struct phy *phy);
 int phy_pm_runtime_get_sync(struct phy *phy);
 int phy_pm_runtime_put(struct phy *phy);
 int phy_pm_runtime_put_sync(struct phy *phy);
+bool phy_pm_runtime_enabled(struct phy *phy);
 void phy_pm_runtime_allow(struct phy *phy);
 void phy_pm_runtime_forbid(struct phy *phy);
 int phy_init(struct phy *phy);
@@ -240,6 +241,11 @@ static inline int phy_pm_runtime_put_sync(struct phy *phy)
 	return -ENOSYS;
 }
 
+static inline bool phy_pm_runtime_enabled(struct phy *phy)
+{
+	return false
+}
+
 static inline void phy_pm_runtime_allow(struct phy *phy)
 {
 	return;
-- 
2.19.1