On Thu, 26 Mar 2015 22:37:01 +0100, Greg Kroah-Hartman wrote:
> On Tue, Mar 17, 2015 at 03:57:00PM +0100, Jakub Kiciński wrote:
> > On Tue, 17 Mar 2015 10:45:26 -0400 (EDT), Jon Ringle wrote:
> > > This makes sense. I did have to fix up my user space app to set 
> > > SER_RS485_RTS_ON_SEND after applying this patch.
> > 
> > Yes, perhaps I should have mentioned that this makes the ioctl return
> > -EINVAL when neither of SER_RS485_RTS_*_SEND flags is set.  This
> > definitely has potential to break people's apps.  Let's see if anyone
> > else has an opinion on this.
> 
> Yes, don't break people's apps.

Do you mean it would be OK if I ignore the incorrect combinations
instead of returning -EINVAL or is any user-visible change in the
behaviour of the driver unacceptable?
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