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Re: [Qemu-arm] [PATCH 1/6] hw/arm/virt: Remove null-check in virt_build_
From: |
Philippe Mathieu-Daudé |
Subject: |
Re: [Qemu-arm] [PATCH 1/6] hw/arm/virt: Remove null-check in virt_build_smbios() |
Date: |
Tue, 5 Mar 2019 22:01:35 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 |
Hi Laszlo,
On 12/10/18 5:02 PM, Laszlo Ersek wrote:
> On 12/07/18 18:03, Philippe Mathieu-Daudé wrote:
>> Since af1f60a4022, the fw_cfg field is always created in machvirt_init().
>> There is no need to null check it.
>>
>> Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
>> ---
>> hw/arm/virt.c | 4 ----
>> 1 file changed, 4 deletions(-)
>>
>> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
>> index f69e7eb399..36303ed59c 100644
>> --- a/hw/arm/virt.c
>> +++ b/hw/arm/virt.c
>> @@ -1279,10 +1279,6 @@ static void virt_build_smbios(VirtMachineState *vms)
>> size_t smbios_tables_len, smbios_anchor_len;
>> const char *product = "QEMU Virtual Machine";
>>
>> - if (!vms->fw_cfg) {
>> - return;
>> - }
>> -
>> if (kvm_enabled()) {
>> product = "KVM Virtual Machine";
>> }
>>
>
> This patch looks correct to me; however, the fact that fw_cfg is always
> present on the virt board does not seem related to commit af1f60a4022
> af1f60a40226 ("hw/arm/virt: remove VirtGuestInfo", 2017-01-09). Said
> commit only flattened the contents of VirtGuestInfo into
> VirtMachineState; the conditions under which fw_cfg would be created
> were not changed.
This is certainly not related to commit af1f60a4022... This is not the
commit I remember I wanted to refer to, I suppose I did a copy/paste
mistake, thanks for carefully reviewing me and catching this!
> As far as I can see (from a number of git-blame / git-show commands),
> fw_cfg was added unconditionally to the virt board in commit
> 578f3c7b0835 ("arm: add fw_cfg to "virt" board", 2014-12-22). And the
> check that you are now (correctly) removing has always been superfluous
> -- it was superfluous already when it was first added in commit
> c30e15658b1b ("smbios: implement smbios support for mach-virt", 2015-09-07).
>
> As far as I can tell, anyway.
>
> If you agree, I suggest mentioning commit c30e15658b1b in the commit
> message, rather than commit af1f60a4022.
Yes, this one makes more sense ;)
>
> With such an update:
>
> Reviewed-by: Laszlo Ersek <address@hidden>
Thanks!
Phil.
>
> Thanks
> Laszlo
>
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