netdev - Re: [PATCH net 1/6] bnx2x: properly initialize statistic counters

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Date:	Tue, 16 Jul 2013 21:14:36 +0300
From:	Dmitry Kravkov <dkravkov@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Dmitry Kravkov <dmitry@...adcom.com>,
	Dave Miller <davem@...emloft.net>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net 1/6] bnx2x: properly initialize statistic counters

On Tue, Jul 16, 2013 at 7:24 PM, Joe Perches <joe@...ches.com> wrote:
> On Tue, 2013-07-16 at 18:21 +0300, Dmitry Kravkov wrote:
>> This prevent second statistics query be sent before first one is complete.
>> This is required since two outstanding queries may cause FW assert.
>
> Please run sparse on your code before submitting patches.
>
>> diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_stats.c
> []
>> @@ -1591,10 +1591,16 @@ void bnx2x_stats_init(struct bnx2x *bp)
>>  {
>>       int /*abs*/port = BP_PORT(bp);
>>       int mb_idx = BP_FW_MB_IDX(bp);
>> +     __le16 init_fw_counter = le16_to_cpu(0xFFFF);
>
>         __le16 init_fw_counter = cpu_to_le16(0xffff);
>

Thanks Joe,  for catching this

>> +     struct stats_counter *counters = &bp->fw_stats_data->storm_counters;
>>
>>       bp->stats_pending = 0;
>>       bp->executer_idx = 0;
>>       bp->stats_counter = 0;
>> +     counters->xstats_counter = init_fw_counter;
>> +     counters->tstats_counter = init_fw_counter;
>> +     counters->ustats_counter = init_fw_counter;
>> +     counters->cstats_counter = init_fw_counter;
>
> It might be better to remove init_fw_counter from
> stack and use a #define or just use cpu_to_le16(0xffff)
> in each init.

I'm not feel well for using same value in each init, probably is better to use
multiple assignment like this:
    counters->xstats_counter =
        counters->tstats_counter =
        counters->ustats_counter =
        counters->cstats_counter = cpu_to_le16(0xffff);
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