linux-kernel - Re: [PATCH net-next] net: ipa: avoid a bogus warning

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Message-ID: <20201031132531.1e179ab5@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Sat, 31 Oct 2020 13:25:31 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Alex Elder <elder@...aro.org>
Cc:     davem@...emloft.net, evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: ipa: avoid a bogus warning

On Sat, 31 Oct 2020 10:15:24 -0500 Alex Elder wrote:
> The previous commit added support for IPA having up to six source
> and destination resources.  But currently nothing uses more than
> four.  (Five of each are used in a newer version of the hardware.)
> 
> I find that in one of my build environments the compiler complains
> about newly-added code in two spots.  Inspection shows that the
> warnings have no merit, but this compiler does not recognize that.
> 
>     ipa_main.c:457:39: warning: array index 5 is past the end of the
>         array (which contains 4 elements) [-Warray-bounds]
>     (and the same warning at line 483)
> 
> We can make this warning go away by changing the number of elements
> in the source and destination resource limit arrays--now rather than
> waiting until we need it to support the newer hardware.  This change
> was coming soon anyway; make it now to get rid of the warning.
> 
> Signed-off-by: Alex Elder <elder@...aro.org>

Applied, thanks!