On some machines, it seems that usb hubs do not get power while
being suspended. We can get something like this in dmesg:
usb usb2: root hub lost power or was reset
When this is the case, .reset_resume is called instead of .resume.
If .reset_resume is not set, bluetooth modules would stay in an unusable
state because the resume function is not called.
Signed-off-by: Wen-chien Jesse Sung <jesse.sung@xxxxxxxxxxxxx>
---
drivers/bluetooth/btusb.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index abfc4ee..db2a4d1 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -1220,6 +1220,7 @@ static struct usb_driver btusb_driver = {
#ifdef CONFIG_PM
.suspend = btusb_suspend,
.resume = btusb_resume,
+ .reset_resume = btusb_resume,
#endif
.id_table = btusb_table,
.supports_autosuspend = 1,
