From: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Danilo Krummrich <dakr@kernel.org>,
Johan Hovold <johan@kernel.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Daniel Scally <djrscally@gmail.com>,
Heikki Krogerus <heikki.krogerus@linux.intel.com>,
Sakari Ailus <sakari.ailus@linux.intel.com>,
Eduardo Ruiz Duarte <toorandom@gmail.com>,
Bartosz Golaszewski <brgl@kernel.org>
Cc: driver-core@lists.linux.dev, linux-kernel@vger.kernel.org,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
linux-acpi@vger.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Subject: [PATCH v2 2/3] driver core: provide new device flag - DEV_FLAG_SWNODE_NOTIFIER
Date: Fri, 23 Oct 2026 12:14:04 +0200 [thread overview]
Message-ID: <20261023-swnode-dev-notify-balance-v2-2-948d920a79f6@oss.qualcomm.com> (raw)
In-Reply-To: <20261023-swnode-dev-notify-balance-v2-0-948d920a79f6@oss.qualcomm.com>
Extend the set of device flags with one that indicates to driver core
that this device was passed as argument to software_node_notify() and
took a reference to this device's software node.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
include/linux/device.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/linux/device.h b/include/linux/device.h
index f31fd62dca9a89c1c9ad565b1cd673b71b740faf..6b082c638d451deef62a607095335e807b0841e2 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -604,6 +604,10 @@ struct device_physical_location {
* ancestor device.
* @DEV_FLAG_OFFLINE_DISABLED: If set, the device is permanently online.
* @DEV_FLAG_OFFLINE: Set after successful invocation of bus type's .offline().
+ * @DEV_FLAG_SWNODE_NOTIFIED: Set if software_node_notify() was called for this
+ * device and took a reference to the device's software node.
+ * Indicates to software_node_notify_remove() that it should drop
+ * the reference.
* @DEV_FLAG_COUNT: Number of defined struct_device_flags.
*/
enum struct_device_flags {
@@ -617,6 +621,7 @@ enum struct_device_flags {
DEV_FLAG_OF_NODE_REUSED = 7,
DEV_FLAG_OFFLINE_DISABLED = 8,
DEV_FLAG_OFFLINE = 9,
+ DEV_FLAG_SWNODE_NOTIFIED = 10,
DEV_FLAG_COUNT
};
@@ -838,6 +843,7 @@ __create_dev_flag_accessors(dma_coherent, DEV_FLAG_DMA_COHERENT);
__create_dev_flag_accessors(of_node_reused, DEV_FLAG_OF_NODE_REUSED);
__create_dev_flag_accessors(offline_disabled, DEV_FLAG_OFFLINE_DISABLED);
__create_dev_flag_accessors(offline, DEV_FLAG_OFFLINE);
+__create_dev_flag_accessors(swnode_notified, DEV_FLAG_SWNODE_NOTIFIED);
#undef __create_dev_flag_accessors
--
2.47.3
next prev parent reply other threads:[~2026-10-23 10:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-23 10:14 [PATCH v2 0/3] driver core: fix unbalanced reference counting for software nodes Bartosz Golaszewski
2026-10-23 10:14 ` [PATCH v2 1/3] driver core: provide a test-and-clear device flag accessor Bartosz Golaszewski
2026-10-23 10:14 ` Bartosz Golaszewski [this message]
2026-10-23 10:14 ` [PATCH v2 3/3] software node: fix unbalanced reference counting Bartosz Golaszewski
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