From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E53C4C433B4 for ; Mon, 12 Apr 2021 09:57:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B8897611AD for ; Mon, 12 Apr 2021 09:57:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242788AbhDLJ5i (ORCPT ); Mon, 12 Apr 2021 05:57:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:37576 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241993AbhDLJxQ (ORCPT ); Mon, 12 Apr 2021 05:53:16 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 404DA6127C; Mon, 12 Apr 2021 09:52:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1618221178; bh=oPD7yiF73N2zzH0OI5Vm4b3OBjM1RRjm4rXNWn9/nRA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=PZghx8JqPkCgTikunNW6mheT/gfJMH7PXHUsfGf6+uNQMGiOQ+DalMQaI3updYN9B kjlmwReqikbBEm3Qc2KO+48IhSIndi56T4jW8x6lkHdW5GI8UgeCBT8maM3m0RNxK6 ugFfUCqdDd72Wv1c02d8mYt9AK4/s2dQr0LfozgY= Date: Mon, 12 Apr 2021 11:52:56 +0200 From: Greg KH To: Johan Hovold Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/4] USB: serial: closing-wait fixes and cleanups Message-ID: References: <20210412093815.736-1-johan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210412093815.736-1-johan@kernel.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 12, 2021 at 11:38:11AM +0200, Johan Hovold wrote: > The port drain_delay parameter is used to add a time-based delay when > closing the port in order to allow the transmit FIFO to drain in cases > where we don't know how to tell if the FIFO is empty. > > This series removes a redundant time-based delay which is no longer > needed, and documents the reason for two other uses where such a delay > is needed to let the transmitter shift register clear. As it turns out, > this is really only needed for one of the two device types handled by > the ti_usb_3410_5052 driver. Reviewed-by: Greg Kroah-Hartman