Re: [PATCH] net: fec: add support of ethtool get_regs

[Fabio Estevam]

Philippe,

On Sat, May 9, 2015 at 6:17 PM, Russell King - ARM Linux
<linux@xxxxxxxxxxxxxxxx> wrote:

> Using memcpy_fromio() to copy device registers is not a good idea -
> it can use a variable access size which can cause bus faults.

An example on how memcpy_fromio() can be avoided in get_regs:
drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c

Regards,

Fabio Estevam
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