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Message-ID: <c3a0fc6a-825c-4de3-b5cf-b454a6d4d3cf@arinc9.com>
Date: Sun, 17 Dec 2023 15:22:27 +0300
From: Arınç ÜNAL <arinc.unal@...nc9.com>
To: Vladimir Oltean <olteanv@...il.com>,
Dan Carpenter <dan.carpenter@...aro.org>
Cc: Simon Horman <horms@...nel.org>, Daniel Golle <daniel@...rotopia.org>,
Landen Chao <Landen.Chao@...iatek.com>, DENG Qingfang <dqfext@...il.com>,
Sean Wang <sean.wang@...iatek.com>, Andrew Lunn <andrew@...n.ch>,
Florian Fainelli <f.fainelli@...il.com>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Russell King <linux@...linux.org.uk>, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org,
Frank Wunderlich <frank-w@...lic-files.de>,
Bartel Eerdekens <bartel.eerdekens@...stell8.be>, mithat.guner@...ont.com,
erkin.bozoglu@...ont.com
Subject: Re: [PATCH net-next 07/15] net: dsa: mt7530: do not run
mt7530_setup_port5() if port 5 is disabled
On 8.12.2023 21:46, Vladimir Oltean wrote:
> Hmm, maybe the problem, all along, was that we let the -ENODEV return
> code from of_get_phy_mode() pass through? "interface" will really be
> uninitialized in that case. It's not a false positive.
>
> Instead of:
>
> ret = of_get_phy_mode(mac_np, &interface);
> if (ret && ret != -ENODEV) {
> ...
> return ret;
> }
>
> it should have been like this, to not complain:
>
> ret = of_get_phy_mode(mac_np, &interface);
> if (ret) {
> ...
> return ret;
> }
>
I just tried this, smatch still reports "interface" as uninitialised.
$ export ARCH=mips CROSS_COMPILE=mips-linux-gnu-
$ ../smatch/smatch_scripts/kchecker --spammy drivers/net/dsa/mt7530.c
UPD include/config/kernel.release
UPD include/generated/utsrelease.h
CHECK scripts/mod/empty.c
CALL scripts/checksyscalls.sh
CC drivers/net/dsa/mt7530.o
CHECK drivers/net/dsa/mt7530.c
drivers/net/dsa/mt7530.c:217 mt7530_mii_read() warn: call of 'warn_slowpath_fmt' with non-constant format argument
drivers/net/dsa/mt7530.c:454 mt7530_setup_port6() error: uninitialized symbol 'ncpo1'.
drivers/net/dsa/mt7530.c:868 mt7530_set_ageing_time() error: uninitialized symbol 'age_count'.
drivers/net/dsa/mt7530.c:868 mt7530_set_ageing_time() error: uninitialized symbol 'age_unit'.
drivers/net/dsa/mt7530.c:2324 mt7530_setup() error: uninitialized symbol 'interface'.
Arınç
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