Re: [PATCH net-next 1/3] enetc: Add mdio bus driver for the PCIe MDIO endpoint
From: Andrew Lunn <andrew@lunn.ch>
Date: 2019-07-23 22:25:03
Also in:
linux-arm-kernel, linux-devicetree, lkml
+ bus = mdiobus_alloc_size(sizeof(u32 *)); + if (!bus) + return -ENOMEM; +
+ bus->priv = pci_iomap_range(pdev, 0, ENETC_MDIO_REG_OFFSET, 0);
This got me confused for a while. You allocate space for a u32
pointer. bus->priv will point to this space. However, you are not
using this space, you {ab}use the pointer to directly hold the return
from pci_iomap_range(). This works, but sparse is probably unhappy,
and you are wasting the space the u32 pointer takes.
Andrew