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: Tue, 24 Mar 2020 14:20:47 +0100 [thread overview]
Message-ID: <1585056047.7151.21.camel@suse.de> (raw)
In-Reply-To: <20200324104610.pqdtaocg6qctlnqv@e107158-lin>
[-- Attachment #1: Type: text/plain, Size: 370 bytes --]
Am Dienstag, den 24.03.2020, 10:46 +0000 schrieb Qais Yousef:
>
> I should have stuck to what I know then. I misread the documentation. Hopefully
> the attached looks better. I don't see the new debug you added emitted.
That is odd. Please try
echo "module usbcore +mfp" > /sys/kernel/debug/dynamic_debug/control
with the attached improved patch.
Regards
Oliver
[-- Attachment #2: 0001-usb-hub-additional-debugging.patch --]
[-- Type: text/x-patch, Size: 697 bytes --]
From 89b420f4b6fd41e8901267ee698ac9e5d498f8db Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@suse.com>
Date: Mon, 23 Mar 2020 16:34:35 +0100
Subject: [PATCH 1/2] usb: hub additional debugging
---
drivers/usb/core/hub.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 54cd8ef795ec..12ce2fdc4c2a 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -1629,6 +1629,7 @@ static int hub_configure(struct usb_hub *hub,
ret = -ENOMEM;
goto fail;
}
+ dev_dbg(hub_dev, "%p URB allocated \n", hub->urb);
usb_fill_int_urb(hub->urb, hdev, pipe, *hub->buffer, maxp, hub_irq,
hub, endpoint->bInterval);
--
2.16.4
next prev parent reply other threads:[~2020-03-24 13:21 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 14:38 lockdep warning in urb.c:363 usb_submit_urb 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
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 [this message]
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
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