From: Hsin-chen Chuang <chharry@chromium.org>
Date: Wed, 8 Jan 2025 12:24:44 +0000 (+0800)
Subject: Bluetooth: Allow reset via sysfs
X-Git-Tag: v6.14-rc1~162^2~19^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=0f8a00137411;p=thirdparty%2Flinux.git

Bluetooth: Allow reset via sysfs

Allow sysfs to trigger hdev reset. This is required to recover devices
that are not responsive from userspace.

Signed-off-by: Hsin-chen Chuang <chharry@chromium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 4b54dbbf0729a..041ce9adc378a 100644
--- a/net/bluetooth/hci_sysfs.c
+++ b/net/bluetooth/hci_sysfs.c
@@ -90,9 +90,28 @@ static void bt_host_release(struct device *dev)
 	module_put(THIS_MODULE);
 }
 
+static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	struct hci_dev *hdev = to_hci_dev(dev);
+
+	if (hdev->reset)
+		hdev->reset(hdev);
+
+	return count;
+}
+static DEVICE_ATTR_WO(reset);
+
+static struct attribute *bt_host_attrs[] = {
+	&dev_attr_reset.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(bt_host);
+
 static const struct device_type bt_host = {
 	.name    = "host",
 	.release = bt_host_release,
+	.groups = bt_host_groups,
 };
 
 void hci_init_sysfs(struct hci_dev *hdev)