linux-kernel - Re: USB Disconnect BUG with RT Kernels (linux-2.6.23-rt1)

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Message-ID: <Pine.LNX.4.64.0710221855220.18815@twin.jikos.cz>
Date:	Mon, 22 Oct 2007 18:57:04 +0200 (CEST)
From:	Jiri Kosina <jikos@...os.cz>
To:	Esben Stien <b0ef@...en-stien.name>
cc:	linux-kernel@...r.kernel.org
Subject: Re: USB Disconnect BUG with RT Kernels (linux-2.6.23-rt1)

On Mon, 22 Oct 2007, Esben Stien wrote:

>  [<c0319a64>] input_unregister_device+0x67/0xfc
>  [<c032a139>] hidinput_disconnect+0x2e/0x47
>  [<c032d697>] hid_disconnect+0x76/0xce
>  [<c02fd799>] usb_unbind_interface+0x2d/0x6e
>  [<c02b7ba4>] __device_release_driver+0x71/0x8e
>  [<c02b7c65>] device_release_driver+0x18/0x21
>  [<c02b76f3>] bus_remove_device+0x70/0x80
>  [<c02b5ddf>] device_del+0x1bb/0x22f
>  [<c02fb4f1>] usb_disable_device+0x5c/0xbb
>  [<c02f807d>] usb_disconnect+0x7a/0xd3
>  [<c02f85a9>] hub_thread+0x30f/0x9ea
>  [<c010d79a>] update_stats_wait_end+0x9b/0xbe
>  [<c03c4c32>] __schedule+0x27e/0x36d
>  [<c01214e5>] autoremove_wake_function+0x0/0x35
>  [<c02f829a>] hub_thread+0x0/0x9ea
>  [<c012142e>] kthread+0x36/0x5c
>  [<c01213f8>] kthread+0x0/0x5c
>  [<c0102913>] kernel_thread_helper+0x7/0x10
>  =======================
> Code: e8 3c c5 ff ff 8b 5e 64 eb 1b 8d 83 08 04 00 00 b9 06 00 02 00 ba 1d 00 00 00 e8 d7 fc e3 ff 8b 9b 10 04 00 00 81 eb 10 04 00 00 <8b> 83 10 04 00 00 0f 18 00 90 8d 93 10 04 00 00 8d 46 64 39 c2 
> EIP: [<c031c3d9>] evdev_disconnect+0x5b/0x96 SS:ESP 0068:c1e07e84

Please try the latest git. Dmitry has pushed patches that implement proper 
locking in input layer, which are very likely going to fix the bug you are 
seeing.

Namely commits 8006479, 6addb1d and 464b241, so please try to reproduce 
with any kernel that has them.

Thanks,

-- 
Jiri Kosina
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