From: Hsin-chen Chuang <chharry@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
---
This commit has been tested on a Chromebook by running
`echo 1 > /sys/class/bluetooth/hci0/reset`
(no changes since v2)
Changes in v2:
- Splitted out the btusb change
net/bluetooth/hci_sysfs.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
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)
--
2.47.1.613.gc27f4b7a9f-goog
