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Re: [Qemu-devel] [PATCH] hw/arm/virt: error_report cleanups


From: Markus Armbruster
Subject: Re: [Qemu-devel] [PATCH] hw/arm/virt: error_report cleanups
Date: Mon, 09 Nov 2015 08:44:30 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

Peter Maydell <address@hidden> writes:

> On 7 November 2015 at 15:25, Andrew Jones <address@hidden> wrote:
>> Signed-off-by: Andrew Jones <address@hidden>
>> ---
>>  hw/arm/virt.c | 10 +++++-----
>>  1 file changed, 5 insertions(+), 5 deletions(-)
>>
>> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
>> index 77d9267599b7e..9c6792cea16f6 100644
>> --- a/hw/arm/virt.c
>> +++ b/hw/arm/virt.c
>> @@ -941,8 +941,8 @@ static void machvirt_init(MachineState *machine)
>>      if (!gic_version) {
>>          gic_version = kvm_arm_vgic_probe();
>>          if (!gic_version) {
>> -            error_report("Unable to determine GIC version supported by 
>> host\n"
>> -                         "Probably KVM acceleration is not supported\n");
>> +            error_report("Unable to determine GIC version supported by 
>> host");
>> +            error_printf("KVM acceleration is probably not supported\n");
>>              exit(1);
>>          }
>>      }
>> @@ -990,7 +990,7 @@ static void machvirt_init(MachineState *machine)
>>          char *cpuopts = g_strdup(cpustr[1]);
>>
>>          if (!oc) {
>> -            fprintf(stderr, "Unable to find CPU definition\n");
>> +            error_report("Unable to find CPU definition");
>>              exit(1);
>>          }
>>          cpuobj = object_new(object_class_get_name(oc));
>> @@ -1126,8 +1126,8 @@ static void virt_set_gic_version(Object *obj, const 
>> char *value, Error **errp)
>>      } else if (!strcmp(value, "host")) {
>>          vms->gic_version = 0; /* Will probe later */
>>      } else {
>> -        error_report("Invalid gic-version option value\n"
>> -                     "Allowed values are: 3, 2, host\n");
>> +        error_report("Invalid gic-version option value");
>> +        error_printf("Allowed gic-version values are: 3, 2, host\n");
>>          exit(1);
>>      }
>
> Would it be better just to have a single error_report
> for these without the newlines, eg
>
>           error_report("Unable to determine GIC version supported by host. "
>                        "KVM acceleration is probably not supported.");
>
> ?

For consistency, error messages should be a phrase, not a full sentence,
let alone a paraphraph.

You can of course turn any parapgraph into a phrase by stringing
together its parts with semicolons, but that's cheating :)

Reviewed-by: Markus Armbruster <address@hidden>



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