LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Oliver Neukum <oneukum@suse.de>
To: Qais Yousef <qais.yousef@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: lockdep warning in urb.c:363 usb_submit_urb
Date: Mon, 23 Mar 2020 17:20:02 +0100
Message-ID: <1584980402.27949.21.camel@suse.de> (raw)
In-Reply-To: <20200323155746.du2ogtvy6gnjzpb4@e107158-lin.cambridge.arm.com>

Am Montag, den 23.03.2020, 15:57 +0000 schrieb Qais Yousef:
> On 03/23/20 16:36, Oliver Neukum wrote:
> > Am Montag, den 23.03.2020, 14:38 +0000 schrieb Qais Yousef:
> > > Hi
> > > 
> > > I've hit the following lockdep warning when I trigger hibernate on arm64
> > > platform (Juno-r2)
> > > 
> > > 
> > > 	echo suspend > /sys/power/disk
> > > 	echo disk > /sys/power/state
> > > 
> > > I only had a usb flash drive attached to it. Let me know if you need more info.
> > 
> > Hi,
> > 
> > that is not a lockdep issue, but the hub driver is not properly killing
> > its URB presumably. Yet, the driver looks correct to me. Please use
> > the additional patch and activate dynamic debugging for usbcore.
> 
> Yes sorry my bad, it's a WARN_ONCE().
> 
> I applied your patch and will reproduce, but meanwhile not sure if you noticed
> this line in my previous email
> 
> [  327.154849] usb usb2: runtime PM trying to activate child device usb2 but parent (7ffb0000.ohci) is not active

Hi,

yes I noticed, but that did not trigger the WARN(). One thing at a time
please.

	Regards
		Oliver


  reply index

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 14:38 Qais Yousef
2020-03-23 15:36 ` Oliver Neukum
2020-03-23 15:54   ` Alan Stern
2020-03-23 16:02     ` Qais Yousef
2020-03-23 16:18     ` Oliver Neukum
2020-03-23 15:57   ` Qais Yousef
2020-03-23 16:20     ` Oliver Neukum [this message]
2020-03-23 17:29   ` Qais Yousef
2020-03-24  9:08     ` Oliver Neukum
2020-03-24 10:46       ` Qais Yousef
2020-03-24 13:20         ` Oliver Neukum
2020-03-24 13:43           ` Qais Yousef
2020-03-24 13:52             ` Alan Stern
2020-03-24 14:06               ` Qais Yousef
2020-03-24 15:56                 ` Alan Stern
2020-03-24 17:22                   ` Qais Yousef
2020-03-24 19:22                     ` Alan Stern
2020-03-25 15:00                       ` Qais Yousef
2020-03-25 20:49                         ` Alan Stern
2020-03-25 21:28                           ` Rafael J. Wysocki
2020-03-26 12:27                             ` Qais Yousef
2020-03-27 20:45                               ` Alan Stern
2020-03-28 14:15                                 ` Rafael J. Wysocki
2020-03-28 19:58                                   ` Alan Stern
2020-03-29  9:16                                     ` Rafael J. Wysocki
2020-03-29 13:56                                       ` Rafael J. Wysocki
2020-03-29 16:27                                       ` Alan Stern
2020-04-03 15:04                                         ` Rafael J. Wysocki
2020-04-03 16:13                                           ` Rafael J. Wysocki
2020-04-03 16:41                                           ` Alan Stern
2020-04-03 18:32                                             ` Rafael J. Wysocki
2020-04-03 20:15                                               ` Alan Stern
2020-04-06 16:45                                                 ` Rafael J. Wysocki
2020-04-06 20:25                                                   ` Alan Stern
2020-04-09 18:45                                                     ` Rafael J. Wysocki
2020-04-11  2:41                                                       ` Alan Stern
2020-04-13 21:32                                                         ` Rafael J. Wysocki
2020-04-14 13:43                                                           ` Rafael J. Wysocki
2020-04-14 17:47                                                             ` Alan Stern
2020-04-15 22:20                                                               ` Rafael J. Wysocki
2020-04-16 15:18                                                                 ` Alan Stern
2020-04-17  9:57                                                                   ` Rafael J. Wysocki
2020-04-17 16:10                                                                     ` Alan Stern
2020-04-17 21:54                                                                       ` Rafael J. Wysocki
2020-04-17 23:37                                                                         ` Alan Stern
2020-04-18  9:40                                                                           ` Rafael J. Wysocki
2020-04-03 17:08                                         ` Rafael J. Wysocki
2020-04-20 20:26                           ` Alan Stern
2020-04-21 11:15                             ` Qais Yousef
2020-03-24 13:47         ` Alan Stern

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1584980402.27949.21.camel@suse.de \
    --to=oneukum@suse.de \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    --cc=qais.yousef@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git
	git clone --mirror https://lore.kernel.org/lkml/8 lkml/git/8.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git