Re: [PATCH v3 2/4] bus: fsl-mc: add restool userspace support

[Greg KH]

On Fri, Mar 23, 2018 at 03:56:24PM +0000, Ioana Ciornei wrote:
> 
> > 
> > On Fri, Mar 23, 2018 at 10:38:56AM -0500, Ioana Ciornei wrote:
> > > +#include "fsl-mc-private.h"
> > > +
> > > +#define FSL_MC_BUS_MAX_MINORS	1
> > 
> > As you only need/want one character device here, why not just use the misc
> > device api?  It's much simpler, and handles all of the housekeeping for you
> > correctly.  It also means I don't have to audit all of your chardev code to verify it
> > is correct :)
> 
> I have considered the misc device api but the fsl-mc bus, since it is
> a platform driver, is probing before the misc char driver.

How?  The misc code is just "core code" there's nothing to "probe" here.
Is this an init-call ordering issue somehow?  A platform driver probe
should be after the misc core is initialized.  And if not, you can
always defer your probe.

thanks,

greg k-h