Re: [PATCH] mei: remove dev_err message on an unsupported ioctl

[Greg Kroah-Hartman]

On Tue, Feb 27, 2018 at 05:26:22PM +0000, Winkler, Tomas wrote:
> > 
> > From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> > 
> > Currently the driver spams the kernel log on unsupported ioctls which is
> > unnecessary as the ioctl returns -ENOIOCTLCMD to indicate this anyway.
> > I suspect this was originally for debugging purposes but it really is not
> > required so remove it.
> >
> 
> This is rather strange as most of the legimit applications are using one IOCTL from kernel 3.0
> Do you have any reference where this call is originated from, frankly this is the first time I got such complain.
> 
> In any case it would be maybe better to change it a warn once call.

Just drop the message, it should not be this easy for userspace to spam
the kernel log.  The patch looks fine to me.

thanks,

greg k-h