The code 'ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));' is unnecessary;

And, the following code :
1.has the same functionality;
2.includes error checking;

Signed-off-by: Andrew.Yuan <andrew.yuan@jaguarmicro.com>
---
 accel/accel-system.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/accel/accel-system.c b/accel/accel-system.c
index f6c947dd82..5d502c8fd8 100644
--- a/accel/accel-system.c
+++ b/accel/accel-system.c
@@ -73,7 +73,7 @@ void accel_system_init_ops_interfaces(AccelClass *ac)
     g_assert(ac_name != NULL);
 
     ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
-    ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
+
     oc = module_object_class_by_name(ops_name);
     if (!oc) {
         error_report("fatal: could not load module for type '%s'", ops_name);
-- 
2.37.0.windows.1

On 9/9/24 12:17 AM, Andrew.Yuan wrote:
> The code 'ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));' is unnecessary;
> 
> And, the following code :
> 1.has the same functionality;
> 2.includes error checking;
> 
> Signed-off-by: Andrew.Yuan <andrew.yuan@jaguarmicro.com>
> ---
>   accel/accel-system.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/accel/accel-system.c b/accel/accel-system.c
> index f6c947dd82..5d502c8fd8 100644
> --- a/accel/accel-system.c
> +++ b/accel/accel-system.c
> @@ -73,7 +73,7 @@ void accel_system_init_ops_interfaces(AccelClass *ac)
>       g_assert(ac_name != NULL);
>   
>       ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
> -    ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
> +

The code you're changing was added by 5141e9a23f ("accel: abort if we fail to
load the accelerator plugin") and I think this repetition is intended. If I have
to guess (first time looking at this code), ACCEL_OPS_CLASS() is creating the class
type QOM functions that the the second module_object_class_by_name() relies on to
catch the module load error the commit is trying to address.

I'm CCing Claudio to get a better idea of the intention here. At the very least we
should add a code comment explaining the reasoning behind initing 'ops' two times
in a row and so on.


Thanks,

Daniel

>       oc = module_object_class_by_name(ops_name);
>       if (!oc) {
>           error_report("fatal: could not load module for type '%s'", ops_name);

On 9/9/24 11:54, Daniel Henrique Barboza wrote:
> 
> 
> On 9/9/24 12:17 AM, Andrew.Yuan wrote:
>> The code 'ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));' is unnecessary;
>>
>> And, the following code :
>> 1.has the same functionality;
>> 2.includes error checking;
>>
>> Signed-off-by: Andrew.Yuan <andrew.yuan@jaguarmicro.com>
>> ---
>>   accel/accel-system.c | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/accel/accel-system.c b/accel/accel-system.c
>> index f6c947dd82..5d502c8fd8 100644
>> --- a/accel/accel-system.c
>> +++ b/accel/accel-system.c
>> @@ -73,7 +73,7 @@ void accel_system_init_ops_interfaces(AccelClass *ac)
>>       g_assert(ac_name != NULL);
>>   
>>       ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
>> -    ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
>> +
> 
> The code you're changing was added by 5141e9a23f ("accel: abort if we fail to
> load the accelerator plugin") and I think this repetition is intended. If I have
> to guess (first time looking at this code), ACCEL_OPS_CLASS() is creating the class
> type QOM functions that the the second module_object_class_by_name() relies on to
> catch the module load error the commit is trying to address.
> 
> I'm CCing Claudio to get a better idea of the intention here. At the very least we
> should add a code comment explaining the reasoning behind initing 'ops' two times
> in a row and so on.
> 
> 
> Thanks,
> 
> Daniel

Hi Daniel, just to signal that I've seen this message and will get to it when I am back to work later this week.

Ciao,

Claudio

> 
>>       oc = module_object_class_by_name(ops_name);
>>       if (!oc) {
>>           error_report("fatal: could not load module for type '%s'", ops_name);

On 9/9/24 12:07, Claudio Fontana wrote:
> On 9/9/24 11:54, Daniel Henrique Barboza wrote:
>>
>>
>> On 9/9/24 12:17 AM, Andrew.Yuan wrote:
>>> The code 'ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));' is unnecessary;
>>>
>>> And, the following code :
>>> 1.has the same functionality;
>>> 2.includes error checking;
>>>
>>> Signed-off-by: Andrew.Yuan <andrew.yuan@jaguarmicro.com>
>>> ---
>>>   accel/accel-system.c | 2 +-
>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/accel/accel-system.c b/accel/accel-system.c
>>> index f6c947dd82..5d502c8fd8 100644
>>> --- a/accel/accel-system.c
>>> +++ b/accel/accel-system.c
>>> @@ -73,7 +73,7 @@ void accel_system_init_ops_interfaces(AccelClass *ac)
>>>       g_assert(ac_name != NULL);
>>>   
>>>       ops_name = g_strdup_printf("%s" ACCEL_OPS_SUFFIX, ac_name);
>>> -    ops = ACCEL_OPS_CLASS(module_object_class_by_name(ops_name));
>>> +
>>
>> The code you're changing was added by 5141e9a23f ("accel: abort if we fail to
>> load the accelerator plugin") and I think this repetition is intended. If I have
>> to guess (first time looking at this code), ACCEL_OPS_CLASS() is creating the class
>> type QOM functions that the the second module_object_class_by_name() relies on to
>> catch the module load error the commit is trying to address.
>>
>> I'm CCing Claudio to get a better idea of the intention here. At the very least we
>> should add a code comment explaining the reasoning behind initing 'ops' two times
>> in a row and so on.
>>
>>
>> Thanks,
>>
>> Daniel
> 
> Hi Daniel, just to signal that I've seen this message and will get to it when I am back to work later this week.
> 
> Ciao,
> 
> Claudio
> 

Hi all, I think it was my mistake. I already detected it during the PULL request, but my message was missed at the time I think:

https://lists.gnu.org/archive/html/qemu-devel/2022-11/msg01056.html

So

Reviewed-by: Claudio Fontana <cfontana@suse.de>

Thanks,

CLaudio