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Date: Sun, 27 Aug 2023 18:47:13 +0200
From: Simon Horman <horms@kernel.org>
To: Mikhail Kobuk <m.kobuk@ispras.ru>
Cc: Siva Reddy Kallam <siva.kallam@broadcom.com>,
	Prashant Sreedharan <prashant@broadcom.com>,
	Michael Chan <mchan@broadcom.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Richard Cochran <richardcochran@gmail.com>,
	Jean Delvare <jdelvare@suse.com>,
	Guenter Roeck <linux@roeck-us.net>, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org,
	lvc-project@linuxtesting.org,
	Alexey Khoroshilov <khoroshilov@ispras.ru>
Subject: Re: [PATCH] ethernet: tg3: remove unreachable code
Message-ID: <20230827164713.GU3523530@kernel.org>
References: <20230825190443.48375-1-m.kobuk@ispras.ru>
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In-Reply-To: <20230825190443.48375-1-m.kobuk@ispras.ru>

On Fri, Aug 25, 2023 at 10:04:41PM +0300, Mikhail Kobuk wrote:
> 'tp->irq_max' value is either 1 [L16336] or 5 [L16354], as indicated in
> tg3_get_invariants(). Therefore, 'i' can't exceed 4 in tg3_init_one()
> that makes (i <= 4) always true. Moreover, 'intmbx' value set at the
> last iteration is not used later in it's scope.
> 
> Found by Linux Verification Center (linuxtesting.org) with SVACE.
> 
> Fixes: 78f90dcf184b ("tg3: Move napi_add calls below tg3_get_invariants")
> Signed-off-by: Mikhail Kobuk <m.kobuk@ispras.ru>
> Reviewed-by: Alexey Khoroshilov <khoroshilov@ispras.ru>

Reviewed-by: Simon Horman <horms@kernel.org>