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thunderbolt: Introduce domain event message handler

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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>
This commit is contained in:
Alan Borzeszkowski
2025-01-21 18:46:20 +01:00
committed by Mika Westerberg
parent 4fd7a1f0f7
commit cdf9956b69
2 changed files with 14 additions and 1 deletions
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2
drivers/thunderbolt/domain.c
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@@ -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);

13
drivers/thunderbolt/tb.h
View File

@@ -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);