Re: [Qemu-devel] [PATCH] Fix for qemu crash on assertion error when adding PCI passthru device.

[Jan Kiszka]

On 2012-07-18 22:42, Ma, Stephen B. wrote:
> Sorry for taking so long to reply.  I am new to this.  Should this patch be 
> committed or just dropped

This bug was fixed by 266ca11a0433643a3cc3146a9837d9f2b0bfbe3b in the
meantime.

Jan

> 
> 
> -----Original Message-----
> From: Jan Kiszka [mailto:address@hidden 
> Sent: Sunday, June 17, 2012 11:25 PM
> To: Anthony Liguori
> Cc: Michael S. Tsirkin; 'address@hidden'; Ma, Stephen B.
> Subject: Re: [PATCH] Fix for qemu crash on assertion error when adding PCI 
> passthru device.
> 
> On 2012-06-17 16:28, Anthony Liguori wrote:
>> On 06/17/2012 03:34 AM, Michael S. Tsirkin wrote:
>>> On Sun, Jun 17, 2012 at 06:26:33AM +0000, Ma, Stephen B. wrote:
>>>>
>>>> Michael,
>>>>
>>>> Thanks for the review.  I added the unparent to the qdev_free.
>>>>
>>>>
>>>> ---
>>>>   hw/qdev.c |    1 +
>>>>   1 files changed, 1 insertions(+), 0 deletions(-)
>>>>
>>>> diff --git a/hw/qdev.c b/hw/qdev.c
>>>> index d2dc28b..ed1328d 100644
>>>> --- a/hw/qdev.c
>>>> +++ b/hw/qdev.c
>>>> @@ -264,6 +264,7 @@ void qdev_init_nofail(DeviceState *dev)
>>>>   /* Unlink device from bus and free the structure.  */
>>>>   void qdev_free(DeviceState *dev)
>>>>   {
>>>> +    object_unparent(OBJECT(dev));
>>>>       object_delete(OBJECT(dev));
>>>>   }
>>>>
>>>> --
>>>> 1.7.1
>>>
>>> Anthony, any feedback?
>>
>> Yes, this is wrong.
>>
>> PCI passthrough isn't in qemu.git so it's not clear to me where this 
>> is happening.  Why would qdev_free be called when adding a PCI 
>> passthru device?
> 
> The bug is reproducible with any in-tree device (at least PCI) that happens 
> to return != 0 from its init handler.
> 
> Jan
> 
>

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