[PATCH net v2] net: mdio: aspeed: add dummy read to avoid read-after-write issue

[Jacky Chou]

Hi Russell King,

> > +	(void)ioread32(ctx->base + ASPEED_MDIO_CTRL);
> 
> What purpose does this cast to void achieve in an already void context?
> 
> We have plenty of functions that get called in the kernel that return a value
> which the caller ignores, never assigning to a variable, none of these warn.
> 

Thanks for pointing this out.

On some older compilers I used to encounter warnings when ignoring a 
function's return value, so adding (void) became a habitual practice.
You're right that it is unnecessary in the kernel context today.
I'll remove it in the next revision.

Thanks,
Jacky