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Subject: Re: 2.6.4 UHCI HCD BUG
From: Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
To: Lukas Hejtmanek <xhejtman@mail.muni.cz>
Cc: Kernel Mailinglist <linux-kernel@vger.kernel.org>
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Date: Fri, 19 Mar 2004 21:29:58 +0100
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On Fri, 2004-03-19 at 19:46, Lukas Hejtmanek wrote:
> Hello,
> 
> with 2.6.4 if I do rmmod uhci_hcd and then modprobe uhci_hcd while running
> X server with USB mouse connected to UHCI USB I got:
> uhci_hcd 0000:00:1d.2: USB bus 3 deregistered
> slab error in kmem_cache_destroy(): cache `uhci_urb_priv': Can't free all object
> s
> Call Trace:
>  [<c013c154>] kmem_cache_destroy+0x85/0xf3
>  [<d0e9ec9b>] uhci_hcd_cleanup+0x1c/0x61 [uhci_hcd]
>  [<c01307f8>] sys_delete_module+0x12d/0x154
>  [<c010af61>] do_IRQ+0x10d/0x140
>  [<c01092c9>] sysenter_past_esp+0x52/0x71
> 
> drivers/usb/host/uhci-hcd.c: not all urb_priv's were freed!
> USB Universal Host Controller Interface driver v2.2
> kmem_cache_create: duplicate cache uhci_urb_priv
> ------------[ cut here ]------------
> kernel BUG at mm/slab.c:1314!
> invalid operand: 0000 [#1]
> PREEMPT 
> CPU:    0
> EIP:    0060:[<c013be42>]    Not tainted
> EFLAGS: 00210202
> EIP is at kmem_cache_create+0x3e9/0x48f
> eax: 00000031   ebx: ceda82c8   ecx: c03df728   edx: cd0ea000
> esi: d0e9f2da   edi: d0e9f2da   ebp: ceda81e8   esp: cd0ebf4c
> ds: 007b   es: 007b   ss: 0068
> Process modprobe (pid: 11450, threadinfo=cd0ea000 task=c32cee40)
> Stack: c0304c80 d0e9f2cc 00000000 cd0ebf68 ceda8224 c0000000 fffffffc 00000010 
>        00000000 fffffff4 c0342cb8 cd0ea000 d08a60ce d0e9f2cc 0000002c 00000080 
>        00000000 00000000 00000000 c0342cd0 d0ea1100 c01321fb c03df5e4 00000001 
> Call Trace:
>  [<d08a60ce>] uhci_hcd_init+0xce/0x130 [uhci_hcd]
>  [<c01321fb>] sys_init_module+0x12e/0x24b
>  [<c01092c9>] sysenter_past_esp+0x52/0x71
> 
> Code: 0f 0b 22 05 c2 44 30 c0 8b 0b e9 76 ff ff ff 8b 47 34 c7 04

Stupid question... Have you tried with the latest -mm patch against
kernel 2.6.5-rc1 from Andrew Morton? It does include the latest bits
from the USB BK repository, AFAIK. For me, the -mm tree solved some USB
bugs I have been experiencing when resuming from APM suspension with the
USB UHCI host.