linux-kernel - Re: [PATCH net] net: usb: lan78xx: fix use of improperly initialized dev->chipid in lan78xx

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Message-ID: <20251006111211.28f018bc@kernel.org>
Date: Mon, 6 Oct 2025 11:12:11 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: I Viswanath <viswanathiyyappan@...il.com>
Cc: Thangaraj.S@...rochip.com, Rengarajan.S@...rochip.com,
 UNGLinuxDriver@...rochip.com, andrew+netdev@...n.ch, davem@...emloft.net,
 edumazet@...gle.com, pabeni@...hat.com, netdev@...r.kernel.org,
 linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
 skhan@...uxfoundation.org, linux-kernel-mentees@...ts.linux.dev,
 david.hunter.linux@...il.com
Subject: Re: [PATCH net] net: usb: lan78xx: fix use of improperly
 initialized dev->chipid in lan78xx_reset

On Wed,  1 Oct 2025 18:44:09 +0530 I Viswanath wrote:
> dev->chipid is used in lan78xx_init_mac_address before it's initialized:
> 
> lan78xx_reset() {
>     lan78xx_init_mac_address()
>         lan78xx_read_eeprom()
>             lan78xx_read_raw_eeprom() <- dev->chipid is used here
> 
>     dev->chipid = ... <- dev->chipid is initialized correctly here
> }
> 
> Reorder initialization so that dev->chipid is set before calling
> lan78xx_init_mac_address().

We need a Fixes tag
-- 
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