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[1/3] thunderbolt: Introduce domain event message handler

Message ID 20250410125600.3074417-2-mika.westerberg@linux.intel.com
State New
Headers show
Series thunderbolt: Notify userspace about tunneling events in the domain | expand

Commit Message

Mika Westerberg April 10, 2025, 12:55 p.m. UTC 
From: Alan Borzeszkowski <alan.borzeszkowski@linux.intel.com>

This patch introduces a function that can be used to send uevent
notifications in the domain to userspace. For instance, it can indicate
that a DisplayPort tunnel could not be established due to insufficient
bandwidth. Userspace can then forward to user via dialog or similar.

Convert boot_acl_store() to call this instead of open-coding.

Signed-off-by: Alan Borzeszkowski <alan.borzeszkowski@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/domain.c |  2 +-
 drivers/thunderbolt/tb.h     | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index 144d0232a70c..a3a7c8059eee 100644
--- a/drivers/thunderbolt/domain.c
+++ b/drivers/thunderbolt/domain.c
@@ -217,7 +217,7 @@  static ssize_t boot_acl_store(struct device *dev, struct device_attribute *attr,
 	ret = tb->cm_ops->set_boot_acl(tb, acl, tb->nboot_acl);
 	if (!ret) {
 		/* Notify userspace about the change */
-		kobject_uevent(&tb->dev.kobj, KOBJ_CHANGE);
+		tb_domain_event(tb, NULL);
 	}
 	mutex_unlock(&tb->lock);
 
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index b54147a1ba87..5869b379e4f7 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -804,6 +804,19 @@  static inline void tb_domain_put(struct tb *tb)
 	put_device(&tb->dev);
 }
 
+/**
+ * tb_domain_event() - Notify userspace about an event in domain
+ * @tb: Domain where event occurred
+ * @envp: Array of uevent environment strings (can be %NULL)
+ *
+ * This function provides a way to notify userspace about any events
+ * that take place in the domain.
+ */
+static inline void tb_domain_event(struct tb *tb, char *envp[])
+{
+	kobject_uevent_env(&tb->dev.kobj, KOBJ_CHANGE, envp);
+}
+
 struct tb_nvm *tb_nvm_alloc(struct device *dev);
 int tb_nvm_read_version(struct tb_nvm *nvm);
 int tb_nvm_validate(struct tb_nvm *nvm);