Hi, This patch adds comments on interface driver suspend callback to emphasize that the failure return value is ignored by USB core in system sleep context, so do not try to recover device for this case, otherwise the recovery things may confuse resume(). Also fixes USB HID and several usbnet drivers which may recover device in suspend failure path of system sleep. v3: - only 2/7 changed, don't change code but add comments to restrict subdriver->suspend(), suggested by Johan Hovold. v2: - improve comments on suspend callback as suggested by Alan - update kerneldoc for usb_suspend_both as suggested by Alan - remove previous check of PMSG_IS_AUTO(message) in cdc_mbim/ qmi_wwan and add comments on suspend failure case, since Bjørn doesn't like the check. - add comments on smsc95xx/smsc75xx v1: - fix compile failure - add comments about handling suspend failure in resume() drivers/hid/usbhid/hid-core.c | 14 +++++--------- drivers/net/usb/cdc_mbim.c | 5 +++++ drivers/net/usb/qmi_wwan.c | 5 +++++ drivers/net/usb/smsc75xx.c | 6 +++++- drivers/net/usb/smsc95xx.c | 6 +++++- drivers/usb/core/driver.c | 11 ++++++++--- drivers/usb/serial/usb-serial.c | 5 +++++ include/linux/usb.h | 7 ++++++- 8 files changed, 44 insertions(+), 15 deletions(-) Thanks -- Ming Lei -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html