Am Freitag, den 21.04.2017, 10:01 +0200 schrieb Bjørn Mork:
> This reverts commit 833415a3e781 ("cdc-wdm: fix "out-of-sync" due to
> missing notifications")
>
> There have been several reports of wdm_read returning unexpected EIO
> errors with QMI devices using the qmi_wwan driver. The reporters
> confirm that reverting prevents these errors. I have been unable to
> reproduce the bug myself, and have no explanation to offer either. But
> reverting is the safe choice here, given that the commit was an
> attempt to work around a firmware problem. Living with a firmware
> problem is still better than adding driver bugs.
>
> Reported-by: Kasper Holtze <kasper@xxxxxxxxx>
> Reported-by: Aleksander Morgado <aleksander@xxxxxxxxxxxxx>
> Reported-by: Daniele Palmas <dnlplm@xxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx> # v4.9+
> Fixes: 833415a3e781 ("cdc-wdm: fix "out-of-sync" due to missing notifications")
> Signed-off-by: Bjørn Mork <bjorn@xxxxxxx>
Acked-by: Oliver Neukum <oneukum@xxxxxxxx>