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[ Upstream commit50b3db3e11] 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 with restarting autonegotiation if an external PHY is used. Fixes:753f492093("[B44]: port to native ssb support") Reviewed-by: Jonas Gorski <jonas.gorski@gmail.com> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Alexey Simakov <bigalex934@gmail.com> Reviewed-by: Michael Chan <michael.chan@broadcom.com> Link: https://patch.msgid.link/20251205155815.4348-1-bigalex934@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>