[PATCH net-next V5 5/6] devlink: Add API to apply eswitch mode boot default

[Mark Bloch <mbloch@nvidia.com>]

Add devl_apply_default_esw_mode() for drivers that can apply the
devlink_eswitch_mode= boot default once their device is ready instead of
waiting for the asynchronous registration work.

Signed-off-by: Mark Bloch <mbloch@nvidia.com>
---
 include/net/devlink.h |  1 +
 net/devlink/default.c | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/include/net/devlink.h b/include/net/devlink.h
index ffe1ad5fb70b..90da03c0112c 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -1661,6 +1661,7 @@ static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,
 
 int devl_register(struct devlink *devlink);
 void devl_unregister(struct devlink *devlink);
+void devl_apply_default_esw_mode(struct devlink *devlink);
 void devlink_register(struct devlink *devlink);
 void devlink_unregister(struct devlink *devlink);
 void devlink_free(struct devlink *devlink);
diff --git a/net/devlink/default.c b/net/devlink/default.c
index 896146d1b8e7..5a37d76731e1 100644
--- a/net/devlink/default.c
+++ b/net/devlink/default.c
@@ -2,6 +2,7 @@
 /* Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved. */
 
 #include <linux/init.h>
+#include <linux/export.h>
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/string.h>
@@ -279,6 +280,24 @@ void devlink_default_esw_mode_apply_pending_clear(struct devlink *devlink)
 	devlink->default_esw_mode_apply_pending = false;
 }
 
+/**
+ * devl_apply_default_esw_mode - Apply devlink eswitch mode boot default
+ * @devlink: devlink
+ *
+ * Apply the devlink eswitch mode selected by the devlink_eswitch_mode=
+ * kernel command line parameter, if any matches @devlink.
+ *
+ * The caller must hold the devlink instance lock.
+ */
+void devl_apply_default_esw_mode(struct devlink *devlink)
+{
+	devl_assert_locked(devlink);
+
+	devlink->default_esw_mode_apply_pending = false;
+	devlink_default_esw_mode_apply_locked(devlink);
+}
+EXPORT_SYMBOL_GPL(devl_apply_default_esw_mode);
+
 void devlink_default_esw_mode_instance_cleanup(struct devlink *devlink)
 {
 	if (cancel_work_sync(&devlink->default_esw_mode_apply_work))
-- 
2.43.0