Re: Bug: cdc_acm blocking write after many small writes

[Oliver Neukum]

On Fr, 2019-04-05 at 17:09 +0200,  Linus K.  wrote:
> Hi,
> I recently submitted this bug to https://bugzilla.kernel.org/ and was 
> redirected here.

Hi,

does your kernel have

commit df3aa13c7bbb307e172c37f193f9a7aa058d4739
Author: Oliver Neukum <oneu...@suse.com>
Date:   Wed Sep 5 17:56:46 2018 +0200


    Revert "cdc-acm: implement put_char() and flush_chars()"

and

commit 93e1c8a638308980309e009cc40b5a57ef87caf1
Author: Romain Izard <romain.izard....@gmail.com>
Date:   Fri Mar 22 16:53:02 2019 +0100

    usb: cdc-acm: fix race during wakeup blocking TX traffic

        Regards
                Oliver