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[v2,16/21] driver core: Add dev_set_drv_sync_state()

Message ID 20250523134025.75130-17-ulf.hansson@linaro.org
State New
Headers show
Series pmdomain: Add generic ->sync_state() support to genpd | expand

Commit Message

Ulf Hansson May 23, 2025, 1:40 p.m. UTC 
From: Saravana Kannan <saravanak@google.com>

This can be used by frameworks to set the sync_state() helper functions
for drivers that don't already have them set.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 include/linux/device.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)
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Patch

diff --git a/include/linux/device.h b/include/linux/device.h
index f6ca813eebbe..fd4300e17b17 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -955,6 +955,18 @@  static inline bool dev_has_sync_state(struct device *dev)
 	return false;
 }
 
+static inline int dev_set_drv_sync_state(struct device *dev,
+					 void (*fn)(struct device *dev))
+{
+	if (!dev || !dev->driver)
+		return 0;
+	if (dev->driver->sync_state && dev->driver->sync_state != fn)
+		return -EBUSY;
+	if (!dev->driver->sync_state)
+		dev->driver->sync_state = fn;
+	return 0;
+}
+
 static inline void dev_set_removable(struct device *dev,
 				     enum device_removable removable)
 {