Re: [Qemu-devel] [PULL 06/16] fdc: Exit if ISA controller does not support DMA

[Paolo Bonzini]

On 26/03/2018 19:06, Thomas Huth wrote:
> On 26.03.2018 15:36, Paolo Bonzini wrote:
>> From: Alexey Kardashevskiy <address@hidden>
>>
>> A "powernv" machine type defines an ISA bus but it does not add any DMA
>> controller to it so it is possible to hit assert(fdctrl->dma) by
>> adding "-machine powernv -device isa-fdc".
>>
>> This replaces assert() with an error message.
>>
>> Signed-off-by: Alexey Kardashevskiy <address@hidden>
>> [thuth: Slightly adjusted error message and updated 
>> scripts/device-crash-test]
> 
> That's strange, the hunk with the update to device-crash-test seems to be 
> missing ... ?
> 
> device-crash-test now reports some "Didn't fail as expected" warnings :-(

Probably I applied this patch to an older tree where the warnings had
not been added.

I'll send a v2 pull request.

Paolo

>> Signed-off-by: Thomas Huth <address@hidden>
>> Message-Id: <address@hidden>
>> Signed-off-by: Paolo Bonzini <address@hidden>
>> ---
>>  hw/block/fdc.c | 5 ++++-
>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>
>> diff --git a/hw/block/fdc.c b/hw/block/fdc.c
>> index 7b7dd41..cd29e27 100644
>> --- a/hw/block/fdc.c
>> +++ b/hw/block/fdc.c
>> @@ -2695,7 +2695,10 @@ static void isabus_fdc_realize(DeviceState *dev, 
>> Error **errp)
>>      fdctrl->dma_chann = isa->dma;
>>      if (fdctrl->dma_chann != -1) {
>>          fdctrl->dma = isa_get_dma(isa_bus_from_device(isadev), isa->dma);
>> -        assert(fdctrl->dma);
>> +        if (!fdctrl->dma) {
>> +            error_setg(errp, "ISA controller does not support DMA");
>> +            return;
>> +        }
>>      }
>>  
>>      qdev_set_legacy_instance_id(dev, isa->iobase, 2);
>>
> 
> FWIW, this is the hunk that was part of the version that I sent to the list:
> 
> diff --git a/scripts/device-crash-test b/scripts/device-crash-test
> index 7ff351d..99d20cb 100755
> --- a/scripts/device-crash-test
> +++ b/scripts/device-crash-test
> @@ -217,7 +217,6 @@ ERROR_WHITELIST = [
>      {'exitcode':-6, 'log':r"Object .* is not an instance of type 
> generic-pc-machine", 'loglevel':logging.ERROR},
>      {'exitcode':-6, 'log':r"Object .* is not an instance of type e500-ccsr", 
> 'loglevel':logging.ERROR},
>      {'exitcode':-6, 'log':r"vmstate_register_with_alias_id: Assertion 
> `!se->compat \|\| se->instance_id == 0' failed", 'loglevel':logging.ERROR},
> -    {'exitcode':-6, 'device':'isa-fdc', 'loglevel':logging.ERROR, 
> 'expected':True},
>      {'exitcode':-11, 'device':'gus', 'loglevel':logging.ERROR, 
> 'expected':True},
>      {'exitcode':-11, 'device':'isa-serial', 'loglevel':logging.ERROR, 
> 'expected':True},
>      {'exitcode':-11, 'device':'sb16', 'loglevel':logging.ERROR, 
> 'expected':True},
> 
>  Thomas
>