thunderbolt: Introduce domain event message handler

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>

diff --git a/drivers/thunderbolt/domain.c b/drivers/thunderbolt/domain.c
index 144d0232a70c11c530650d82c3d6b3acad6316d2..a3a7c8059eeeb7ad6b496a47c75630e8a1eb7d6a 100644 (file)
--- 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 4e2faa0d5dba7fc0b63d617e28cfc89df3c5cd39..87afd5a7c504b542b77a1dcde83e366415489817 100644 (file)
--- 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);