Re: [PATCH net-next 6/9] net: phy: add backplane kr driver support

[Joe Perches]

On Fri, 2020-03-27 at 15:22 +0100, Andrew Lunn wrote:
> > +/* Backplane custom logging */
> > +#define BPDEV_LOG(name) \
> > +	char log_buffer[LOG_BUFFER_SIZE]; \
> > +	va_list args; va_start(args, msg); \
> > +	vsnprintf(log_buffer, LOG_BUFFER_SIZE - 1, msg, args); \
> > +	if (!bpphy->attached_dev) \
> > +		dev_##name(&bpphy->mdio.dev, log_buffer); \
> > +	else \
> > +		dev_##name(&bpphy->mdio.dev, "%s: %s", \
> > +			netdev_name(bpphy->attached_dev), log_buffer); \
> > +	va_end(args)

This could also use %pV instead of an intermediate buffer.

It's also bad form to use macros with required
external variables.