Re: [PATCH v5 02/10] ethdev: make error checking macros public

[Declan Doherty <declan.doherty@intel.com>]

On 10/11/15 15:50, Adrien Mazarguil wrote:
> On Mon, Nov 09, 2015 at 08:34:11PM +0000, Declan Doherty wrote:
>> Move the function pointer and port id checking macros to rte_ethdev and
>> rte_dev header files, so that they can be used in the static inline
>> functions there. Also replace the RTE_LOG call within
>> RTE_PMD_DEBUG_TRACE so this macro can be built with the -pedantic flag
>>
>> Signed-off-by: Declan Doherty <declan.doherty@intel.com>
>> ---
>>   lib/librte_eal/common/include/rte_dev.h | 52 +++++++++++++++++++++++++++++++
>>   lib/librte_ether/rte_ethdev.c           | 54 ---------------------------------
>>   lib/librte_ether/rte_ethdev.h           | 26 ++++++++++++++++
>>   3 files changed, 78 insertions(+), 54 deletions(-)
>>
>> diff --git a/lib/librte_eal/common/include/rte_dev.h b/lib/librte_eal/common/include/rte_dev.h
>> index f601d21..fd09b3d 100644
>> --- a/lib/librte_eal/common/include/rte_dev.h
>> +++ b/lib/librte_eal/common/include/rte_dev.h
>> @@ -46,8 +46,60 @@
>>   extern "C" {
>>   #endif
>>
>> +#include <stdio.h>
>>   #include <sys/queue.h>
>>
>> +#include <rte_log.h>
>> +
>> +__attribute__((format(printf, 2, 0)))
>> +static inline void
>> +rte_pmd_debug_trace(const char *func_name, const char *fmt, ...)
>> +{
>> +	va_list ap;
>> +
>> +	va_start(ap, fmt);
>
> I suggest adding an empty line here since we're mixing code and
> declarations.
>

sure no problem.

>> +	char buffer[vsnprintf(NULL, 0, fmt, ap)];
>
> I forgot an extra byte for trailing '\0' in my original comment, the above
> line should read:
>
>   char buffer[vsnprintf(NULL, 0, fmt, ap) + 1];
>
> Otherwise the last character will be missing. Did you test that function?
>

I didn't notice the truncation in the log message, I was just missing 
and "!" in the log message and didn't miss it. I'll push a new version 
with this fix.

>> +
>> +	va_end(ap);
>> +
>> +	va_start(ap, fmt);
>> +	vsnprintf(buffer, sizeof(buffer), fmt, ap);
>> +	va_end(ap);
>> +
>> +	rte_log(RTE_LOG_ERR, RTE_LOGTYPE_PMD, "%s: %s", func_name, buffer);
>> +}
>> +
<snip>
>> --
>> 2.4.3
>>
>