Re: [Qemu-devel] [PATCH] cirrus_vga: Remove unneeded reset

[Isaku Yamahata]

On Mon, Mar 28, 2011 at 07:18:04AM +0200, Stefan Weil wrote:
> Am 28.03.2011 04:17, schrieb Isaku Yamahata:
>> Hi. cirrus_init_common() is used by both isa and pci cirrus.
>> and isa cirrus isn't qdevfied yet.
>> So what you want is
>> - remove qemu_register_reset() and cirrus_reset() from cirrus_init_common()
>>
>> - add to PCIDeviceInfo cirrus_vga_info
>>    .qdev.reset = cirrus_reset()
>>    in order to use pci reset framework.
>>
>> - add qemu_register_reset() and cirrus_reset() to isa_cirrus_vga_init()
>>    (Hopefully convert isa cirrus to qdev. and use .qdev.reset at best.
>>     But it's up to you)
>>
>> thanks,
>>
>> On Sat, Mar 26, 2011 at 10:53:09PM +0100, Stefan Weil wrote:
>>> cirrus_reset is also called by the pci framework,
>>> so there is no need to call it in cirrus_init_common.
>>>
>>> Cc: Michael S. Tsirkin<address@hidden>
>>> Signed-off-by: Stefan Weil<address@hidden>
>>> ---
>>>   hw/cirrus_vga.c |    1 -
>>>   1 files changed, 0 insertions(+), 1 deletions(-)
>>>
>>> diff --git a/hw/cirrus_vga.c b/hw/cirrus_vga.c
>>> index 2724f7b..bdf4c8b 100644
>>> --- a/hw/cirrus_vga.c
>>> +++ b/hw/cirrus_vga.c
>>> @@ -3024,7 +3024,6 @@ static void cirrus_init_common(CirrusVGAState * s, 
>>> int device_id, int is_pci)
>>>       s->vga.cursor_draw_line = cirrus_cursor_draw_line;
>>>
>>>       qemu_register_reset(cirrus_reset, s);
>>> -    cirrus_reset(s);
>>>   }
>>>
>>>   /***************************************
>>> -- 
>>> 1.7.2.5
>>
>
>
> I tested the new code with isa pc, too. In gdb, I could see that it also  
> calls
> cirrus_reset twice. But isa pc is broken since the switch to sea bios, so
> obviously isa is an unmaintained part of qemu. Even with bochs bios,
> it no longer works, so it is broken at least twice.

Ah, I see. The the second reset is called not via pci reset framework,
but qemu reset framework. So removing the above reset call makes sense.
It would be another patch to make use of pci reset framework.
-- 
yamahata