Re: [PATCH v4.3] net: phy: Add driver for Motorcomm yt8521 gigabit ethernet phy

[Jakub Kicinski <kuba@kernel.org>]

On Tue, 16 Aug 2022 19:17:03 +0800 Frank wrote:
>  Add a driver for the motorcomm yt8521 gigabit ethernet phy. We have verified
>  the driver on StarFive VisionFive development board, which is developed by
>  Shanghai StarFive Technology Co., Ltd.. On the board, yt8521 gigabit ethernet
>  phy works in utp mode, RGMII interface, supports 1000M/100M/10M speeds, and
>  wol(magic package).

Clang reports:

drivers/net/phy/motorcomm.c:1121:6: warning: variable 'changed' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
        if (err > 0)
            ^~~~~~~
drivers/net/phy/motorcomm.c:1124:47: note: uninitialized use occurs here
        return genphy_check_and_restart_aneg(phydev, changed);
                                                     ^~~~~~~
drivers/net/phy/motorcomm.c:1121:2: note: remove the 'if' if its condition is always true
        if (err > 0)
        ^~~~~~~~~~~~
drivers/net/phy/motorcomm.c:1095:18: note: initialize the variable 'changed' to silence this warning
        int err, changed;
                        ^
                         = 0