linux-kernel - [RFC PATCH v5 2/4] driver core: Add dev_is_drv_state

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Date:   Wed, 21 Jun 2023 17:40:17 +0300
From:   Abel Vesa <abel.vesa@...aro.org>
To:     "Rafael J . Wysocki" <rafael@...nel.org>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Saravana Kannan <saravanak@...gle.com>
Cc:     Bjorn Andersson <andersson@...nel.org>, linux-pm@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: [RFC PATCH v5 2/4] driver core: Add dev_is_drv_state_synced()

This can be used by drivers to figure out if a different device
driver has state synced or not for a specific device.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
 include/linux/device.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index bae11928ef7e..8f042f04b5d9 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -1007,6 +1007,20 @@ static inline int dev_set_drv_sync_state(struct device *dev,
 	return 0;
 }
 
+static inline bool dev_is_drv_state_synced(struct device *dev)
+{
+	bool ret = false;
+
+	if (!dev)
+		return ret;
+
+	device_lock(dev);
+	ret = dev->state_synced;
+	device_unlock(dev);
+
+	return ret;
+}
+
 static inline void dev_set_removable(struct device *dev,
 				     enum device_removable removable)
 {
-- 
2.34.1