[lvc-project] [PATCH net] broadcom: b44: prevent uninitialized value usage

[Andrew Lunn]

On Thu, Dec 04, 2025 at 08:22:43AM +0300, Alexey Simakov wrote:
> On execution path with raised B44_FLAG_EXTERNAL_PHY, b44_readphy()
> leaves bmcr value uninitialized and it is used later in the code.
> 
> Add check of this flag at the beginning of the b44_nway_reset() and
> exit early of the function if an external PHY is used, that would
> also correspond to other b44_readphy() call sites.
> 
> Found by Linux Verification Center (linuxtesting.org) with Svace.
> 
> Fixes: 753f492093da ("[B44]: port to native ssb support")
> Signed-off-by: Alexey Simakov <bigalex934 at gmail.com>

Reviewed-by: Andrew Lunn <andrew at lunn.ch>

    Andrew