Re: [PATCH 07/11] mips/malta: Fix create_cps() error handling

[Markus Armbruster <armbru@redhat.com>]

Philippe Mathieu-Daudé <f4bug@amsat.org> writes:

> On 4/24/20 9:20 PM, Markus Armbruster wrote:
>> The Error ** argument must be NULL, &error_abort, &error_fatal, or a
>> pointer to a variable containing NULL.  Passing an argument of the
>> latter kind twice without clearing it in between is wrong: if the
>> first call sets an error, it no longer points to NULL for the second
>> 
>> create_cps() is wrong that way.  The last calls treats an error as
>> fatal.  Do that for the prior ones, too.
>> 
>> Fixes: bff384a4fbd5d0e86939092e74e766ef0f5f592c
>> Cc: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>
>> Cc: "Philippe Mathieu-Daudé" <philmd@redhat.com>
>> Cc: Aurelien Jarno <aurelien@aurel32.net>
>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>> ---
>>  hw/mips/mips_malta.c | 15 ++++++---------
>>  1 file changed, 6 insertions(+), 9 deletions(-)
>> 
>> diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
>> index e4c4de1b4e..17bf41616b 100644
>> --- a/hw/mips/mips_malta.c
>> +++ b/hw/mips/mips_malta.c
>> @@ -1185,17 +1185,14 @@ static void create_cpu_without_cps(MachineState *ms,
>>  static void create_cps(MachineState *ms, MaltaState *s,
>>                         qemu_irq *cbus_irq, qemu_irq *i8259_irq)
>>  {
>> -    Error *err = NULL;
>> -
>>      sysbus_init_child_obj(OBJECT(s), "cps", OBJECT(&s->cps), sizeof(s->cps),
>>                            TYPE_MIPS_CPS);
>> -    object_property_set_str(OBJECT(&s->cps), ms->cpu_type, "cpu-type", &err);
>> -    object_property_set_int(OBJECT(&s->cps), ms->smp.cpus, "num-vp", &err);
>> -    object_property_set_bool(OBJECT(&s->cps), true, "realized", &err);
>> -    if (err != NULL) {
>> -        error_report("%s", error_get_pretty(err));
>
> In https://www.mail-archive.com/qemu-devel@nongnu.org/msg695645.html I
> also remove "qemu/error-report.h" which is not needed once you remove
> this call.

Missed it, sorry.  I only reviewed the Coccinelle scripts [PATCH 1+3/7].

I'd replace my patch by yours to give you proper credit, but your commit
message mentions "the coccinelle script", presumably the one from PATCH
1/7, and that patch isn't quite ready in my opinion.

>> -        exit(1);
>> -    }
>> +    object_property_set_str(OBJECT(&s->cps), ms->cpu_type, "cpu-type",
>> +                            &error_fatal);
>> +    object_property_set_int(OBJECT(&s->cps), ms->smp.cpus, "num-vp",
>> +                            &error_fatal);
>> +    object_property_set_bool(OBJECT(&s->cps), true, "realized",
>> +                             &error_fatal);
>>  
>>      sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->cps), 0, 0, 1);
>>  
>>