4.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mika Westerberg mika.westerberg@linux.intel.com
commit 007a74907deeceefef9dc3ec4679fbd7921eaa51 upstream.
The commit 9aaa3b8b4c56 ("thunderbolt: Add support for preboot ACL") introduced boot_acl attribute but missed the fact that now userspace needs to poll the attribute constantly to find out whether it has changed or not. Fix this by sending notification to the userspace whenever the boot_acl attribute is changed.
Fixes: 9aaa3b8b4c56 ("thunderbolt: Add support for preboot ACL") Reported-and-tested-by: Christian Kellner christian@kellner.me Signed-off-by: Mika Westerberg mika.westerberg@linux.intel.com Reviewed-by: Christian Kellner christian@kellner.me Acked-by: Yehezkel Bernat yehezkelshb@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/thunderbolt/domain.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/thunderbolt/domain.c +++ b/drivers/thunderbolt/domain.c @@ -213,6 +213,10 @@ static ssize_t boot_acl_store(struct dev goto err_free_acl; } 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); + } mutex_unlock(&tb->lock);
err_free_acl: