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From: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
To: Jiri Kosina <jikos@jikos.cz>
Subject: Re: 2.6.23-rc1-mm2
Date: Thu, 2 Aug 2007 11:47:33 +0200
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Cc: Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       linux-usb-devel@lists.sourceforge.net, Greg KH <gregkh@suse.de>
References: <20070731230932.a9459617.akpm@linux-foundation.org> <20070801011323.6e8d8259.akpm@linux-foundation.org> <Pine.LNX.4.64.0708011221430.26230@twin.jikos.cz>
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Hello,

> > > usb 2-1: USB disconnect, address 2
> > > BUG: atomic counter underflow at:
> > >  [<c010456a>] show_trace_log_lvl+0x1a/0x30
> > >  [<c010508d>] show_trace+0x12/0x14
> > >  [<c01051e0>] dump_stack+0x15/0x17
> > >  [<c01418cf>] __free_pages+0x50/0x52
> > >  [<c01418f0>] free_pages+0x1f/0x21
> > >  [<c010783d>] dma_free_coherent+0x43/0x9c
> > >  [<c0315067>] hcd_buffer_free+0x43/0x6a
> > >  [<c030b2b4>] usb_buffer_free+0x23/0x29
> > >  [<c0346db4>] hid_free_buffers+0x23/0x71
> > >  [<c0346eb2>] hid_disconnect+0xb0/0xc8
> > >  [<c0313676>] usb_unbind_interface+0x30/0x72
> > >  [<c02c6df0>] __device_release_driver+0x6a/0x92
> > >  [<c02c71c3>] device_release_driver+0x20/0x36
> > >  [<c02c6736>] bus_remove_device+0x62/0x85
> > >  [<c02c49f8>] device_del+0x16d/0x27c
> > >  [<c0310f25>] usb_disable_device+0x7a/0xe2
> > >  [<c030d0bc>] usb_disconnect+0x94/0xde
> > >  [<c030e030>] hub_thread+0x2fe/0xc1b
> > >  [<c0128aee>] kthread+0x36/0x58
> > >  [<c0104233>] kernel_thread_helper+0x7/0x14
> > >  =======================
> > > uhci_hcd 0000:00:0c.0: dma_pool_free buffer-32, 6b6b6b6b/6b6b6b6b (bad dma)
> 
> Mariusz,
> 
> I guess the patch below (which I have just added to my tree) fixes that, 
> right? Thanks.

Yes - that's correct. This patch fixes the bug. Thanks.

	Mariusz
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