Re: [PATCH 6/7] tty/powerpc: introduce the ePAPR embeddedhypervisor byte channel driver

[Alan Cox]

On Thu, 19 May 2011 07:22:25 -0700
Greg KH <greg@xxxxxxxxx> wrote:

> On Thu, May 19, 2011 at 08:54:31AM -0500, Timur Tabi wrote:
> > +/*
> > + * The udbg subsystem calls this function to display a single character.
> > + * We convert CR to a CR/LF.
> > + */
> > +static void ehv_bc_udbg_putc(char c)
> > +{
> > +	if (c == '\n')
> > +		byte_channel_spin_send('\r');
> > +
> > +	byte_channel_spin_send(c);
> > +}
> 
> Why do this conversion in the driver?  Shouldn't that be something that
> userspace worries about?

udbg is a bit before the land of userspace so it needs to do whatever
adaption the firmware/happyvisor interface wants.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/