From mboxrd@z Thu Jan  1 00:00:00 1970
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Subject: [v3] usb: warm-reset ports on hub resume, if requested
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Message-Id: <aadd9dcb-bbf0-4b0b-9df2-3767686164ac@linux.intel.com>
Date: Fri, 1 Feb 2019 13:46:27 +0200
To: Alan Stern <stern@rowland.harvard.edu>, Jan-Marek Glogowski <glogow@fbihome.de>
Cc: linux-usb@vger.kernel.org, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Kai-Heng Feng <kai.heng.feng@canonical.com>, Nicolas Boichat <drinkcat@chromium.org>, Nicolas Saenz Julienne <nsaenzjulienne@suse.de>, Jon Flatley <jflat@chromium.org>, Oliver Neukum <oneukum@suse.com>
List-ID: <linux-usb.vger.kernel.org>
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