Re: [PATCH net-next v22 4/9] mfd: an8855: Add support for Airoha AN8855 Switch

[Jakub Kicinski <kuba@kernel.org>]

On Tue, 15 Sep 2026 14:38:01 +0200 Christian Marangi wrote:
> Add support for Airoha AN8855 Switch that provide support for a DSA
> switch and a NVMEM provider.
> 
> Also make use of the mdio-regmap driver and register a regmap for each
> internal PHY of the switch.
> This is needed to handle the double usage of the PHYs as both PHY and
> Switch accessor.

GCC spews warnings:

drivers/mfd/airoha-an8855.c: In function ‘an8855_mdio_register’:
drivers/mfd/airoha-an8855.c:438:48: warning: ‘-phy’ directive output may be truncated writing 4 bytes into a region of size between 1 and 61 [-Wformat-truncation=]
  438 |         snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-phy%d", priv->bus->id, addr);
      |                                                ^~~~
In function ‘an8855_phy_bus_register’,
    inlined from ‘an8855_mdio_register’ at ../drivers/mfd/airoha-an8855.c:469:9:
drivers/mfd/airoha-an8855.c:438:45: note: using the range [-2147483648, 2147483647] for directive argument
  438 |         snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-phy%d", priv->bus->id, addr);
      |                                             ^~~~~~~~~~
drivers/mfd/airoha-an8855.c:438:9: note: ‘snprintf’ output between 6 and 76 bytes into a destination of size 61
  438 |         snprintf(mrc.name, MII_BUS_ID_SIZE, "%s-phy%d", priv->bus->id, addr);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~