diff options
| -rw-r--r-- | drivers/usb/serial/usb-serial.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index bbe7f2eb8160..2fc05004c1b6 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -1137,6 +1137,11 @@ int usb_serial_suspend(struct usb_interface *intf, pm_message_t message) serial->suspending = 1; + /* + * serial->type->suspend() MUST return 0 in system sleep context, + * otherwise, the resume callback has to recover device from + * previous suspend failure. + */ if (serial->type->suspend) { r = serial->type->suspend(serial, message); if (r < 0) { |