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 the USB serial, HID and several usbnet drivers
which may recover device in suspend failure path of system sleep.
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 | 3 ++-
include/linux/usb.h | 7 ++++++-
8 files changed, 41 insertions(+), 16 deletions(-)
Thanks,
--
Ming Lei
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