netdev - Re: [PATCH v4.4.y, v4.9.y] igb: Remove incorrect "unexpected SYS WRAP" log message

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Date:   Thu, 25 Feb 2021 09:17:54 +0100
From:   Greg KH <greg@...ah.com>
To:     Punit Agrawal <punit1.agrawal@...hiba.co.jp>
Cc:     stable@...r.kernel.org, netdev@...r.kernel.org,
        jesse.brandeburg@...el.com, anthony.l.nguyen@...el.com,
        daichi1.fukui@...hiba.co.jp, nobuhiro1.iwamatsu@...hiba.co.jp,
        Corinna Vinschen <vinschen@...hat.com>,
        Jacob Keller <jacob.e.keller@...el.com>,
        Aaron Brown <aaron.f.brown@...el.com>
Subject: Re: [PATCH v4.4.y, v4.9.y] igb: Remove incorrect "unexpected SYS
 WRAP" log message

On Thu, Feb 25, 2021 at 09:54:06AM +0900, Punit Agrawal wrote:
> From: Corinna Vinschen <vinschen@...hat.com>
> 
> commit 2643e6e90210e16c978919617170089b7c2164f7 upstream
> 
> TSAUXC.DisableSystime is never set, so SYSTIM runs into a SYS WRAP
> every 1100 secs on 80580/i350/i354 (40 bit SYSTIM) and every 35000
> secs on 80576 (45 bit SYSTIM).
> 
> This wrap event sets the TSICR.SysWrap bit unconditionally.
> 
> However, checking TSIM at interrupt time shows that this event does not
> actually cause the interrupt.  Rather, it's just bycatch while the
> actual interrupt is caused by, for instance, TSICR.TXTS.
> 
> The conclusion is that the SYS WRAP is actually expected, so the
> "unexpected SYS WRAP" message is entirely bogus and just helps to
> confuse users.  Drop it.
> 
> Signed-off-by: Corinna Vinschen <vinschen@...hat.com>
> Acked-by: Jacob Keller <jacob.e.keller@...el.com>
> Tested-by: Aaron Brown <aaron.f.brown@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> ---
> [ Due to confusion about stable rules for networking the request was
> mistakenly sent to netdev only[0]. Apologies if you're seeing this
> again. ]

No signed-off-by: from you?  :(