netdev - Re: [PATCH net-next 2/2] ibmvnic: Update firmware error reporting with cause string

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Date:   Mon, 6 Aug 2018 23:34:55 -0500
From:   Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
To:     Nathan Fontenot <nfont@...ux.vnet.ibm.com>, netdev@...r.kernel.org
Cc:     jallen@...ux.vnet.ibm.com
Subject: Re: [PATCH net-next 2/2] ibmvnic: Update firmware error reporting
 with cause string

On 08/06/2018 10:48 PM, Nathan Fontenot wrote:
>
> On 08/06/2018 09:39 PM, Thomas Falcon wrote:
>> Print a string instead of the error code. Since there is a
>> possibility that the driver can recover, classify it as a
>> warning instead of an error.
>>
>> Signed-off-by: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
>> ---
>>   drivers/net/ethernet/ibm/ibmvnic.c | 34 
>> ++++++++++++++++++++++++++++++----
>>   1 file changed, 30 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/net/ethernet/ibm/ibmvnic.c 
>> b/drivers/net/ethernet/ibm/ibmvnic.c
>> index 109e4a58efad..dafdd4ade705 100644
>> --- a/drivers/net/ethernet/ibm/ibmvnic.c
>> +++ b/drivers/net/ethernet/ibm/ibmvnic.c
>> @@ -3825,15 +3825,41 @@ static void 
>> handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
>>       ibmvnic_send_crq(adapter, &crq);
>>   }
>>
>> +static const char *ibmvnic_fw_err_cause(u16 cause)
>> +{
>> +    switch (cause) {
>> +    case ADAPTER_PROBLEM:
>> +        return "adapter problem";
>> +    case BUS_PROBLEM:
>> +        return "bus problem";
>> +    case FW_PROBLEM:
>> +        return "firmware problem";
>> +    case DD_PROBLEM:
>> +        return "device driver problem";
>> +    case EEH_RECOVERY:
>> +        return "EEH recovery";
>> +    case FW_UPDATED:
>> +        return "firmware updated";
>> +    case LOW_MEMORY:
>> +        return "low Memory";
>> +    default:
>> +        return "unknown";
>> +    }
>> +}
>> +
>>   static void handle_error_indication(union ibmvnic_crq *crq,
>>                       struct ibmvnic_adapter *adapter)
>>   {
>>       struct device *dev = &adapter->vdev->dev;
>> +    u16 cause;
>> +
>> +    cause = be16_to_cpu(crq->error_indication.error_cause);
>>
>> -    dev_err(dev, "Firmware reports %serror, cause %d\n",
>> -        crq->error_indication.flags
>> -            & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
>> -        be16_to_cpu(crq->error_indication.error_cause));
>> +    dev_warn_ratelimited(dev,
>> +                 "Firmware reports %serror, cause: %s. Starting 
>> recovery...\n",
>
>                                                ^^^^^^^
>
> You're going to want a space between after the %s here.
>
> -Nathan
>

It does look odd at first glance, but there is a space after "FATAL" below.

Thanks,
Tom

>> + crq->error_indication.flags
>> +                & IBMVNIC_FATAL_ERROR ? "FATAL " : "",
>> +                 ibmvnic_fw_err_cause(cause));
>>
>>       if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
>>           ibmvnic_reset(adapter, VNIC_RESET_FATAL);
>>