diff mbox series

[v2,3/3] Bluetooth: Allow reset via sysfs

Message ID 20250108184811.v2.3.I8342291b757b20cd4cdbbfe658dc58ed5df46565@changeid (mailing list archive)
State Superseded
Headers show
Series [v2,1/3] Bluetooth: Remove the cmd timeout count in btusb | expand

Checks

Context Check Description
tedd_an/pre-ci_am success Success
tedd_an/SubjectPrefix success Gitlint PASS

Commit Message

Hsin-chen Chuang Jan. 8, 2025, 10:48 a.m. UTC 
From: Hsin-chen Chuang <chharry@chromium.org>

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>
---
This commit has been tested on a Chromebook by running
`echo 1 > /sys/class/bluetooth/hci0/reset`

Changes in v2:
- Splitted out the btusb change

 net/bluetooth/hci_sysfs.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
diff mbox series

Patch

diff --git a/net/bluetooth/hci_sysfs.c b/net/bluetooth/hci_sysfs.c
index 4b54dbbf0729..041ce9adc378 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)