From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:56350 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754128AbdJIMEt (ORCPT ); Mon, 9 Oct 2017 08:04:49 -0400 Subject: Patch "usb: Increase quirk delay for USB devices" has been added to the 3.18-stable tree To: dmitry@daynix.com, gregkh@linuxfoundation.org Cc: , From: Date: Mon, 09 Oct 2017 14:03:04 +0200 Message-ID: <150755058417150@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled usb: Increase quirk delay for USB devices to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-increase-quirk-delay-for-usb-devices.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b2a542bbb3081dbd64acc8929c140d196664c406 Mon Sep 17 00:00:00 2001 From: Dmitry Fleytman Date: Tue, 5 Sep 2017 11:40:56 +0300 Subject: usb: Increase quirk delay for USB devices From: Dmitry Fleytman commit b2a542bbb3081dbd64acc8929c140d196664c406 upstream. Commit e0429362ab15 ("usb: Add device quirk for Logitech HD Pro Webcams C920 and C930e") introduced quirk to workaround an issue with some Logitech webcams. The workaround is introducing delay for some USB operations. According to our testing, delay introduced by original commit is not long enough and in rare cases we still see issues described by the aforementioned commit. This patch increases delays introduced by original commit. Having this patch applied we do not see those problems anymore. Signed-off-by: Dmitry Fleytman Signed-off-by: Greg Kroah-Hartman --- drivers/usb/core/config.c | 2 +- drivers/usb/core/hub.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) --- a/drivers/usb/core/config.c +++ b/drivers/usb/core/config.c @@ -747,7 +747,7 @@ int usb_get_configuration(struct usb_dev } if (dev->quirks & USB_QUIRK_DELAY_INIT) - msleep(100); + msleep(200); result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, bigbuffer, length); --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -4719,7 +4719,7 @@ static void hub_port_connect(struct usb_ goto loop; if (udev->quirks & USB_QUIRK_DELAY_INIT) - msleep(1000); + msleep(2000); /* consecutive bus-powered hubs aren't reliable; they can * violate the voltage drop budget. if the new child has Patches currently in stable-queue which might be from dmitry@daynix.com are queue-3.18/usb-increase-quirk-delay-for-usb-devices.patch