[PATCH v3 4/5] drm: Add decoding of i915 ioctls

Patrik Jakobsson patrik.jakobsson at linux.intel.com
Fri Jul 10 12:45:37 UTC 2015


On Thu, Jul 09, 2015 at 05:19:33AM +0300, Dmitry V. Levin wrote:
> On Wed, Jul 08, 2015 at 03:11:36AM +0300, Dmitry V. Levin wrote:
> > On Mon, Jul 06, 2015 at 04:40:24PM +0200, Gabriel Laskar wrote:
> > > On Mon, 6 Jul 2015 12:35:52 +0200, Patrik Jakobsson wrote:
> > > > On Fri, Jul 03, 2015 at 03:36:09AM +0300, Dmitry V. Levin wrote:
> [...]
> > > > > Maybe it's time to deal with this issue in a more generic way.
> [...]
> > > Anyway, SYS_FUNC(ioctl) is a bit complicated, and the handling of the
> > > fallbacks on failure should be more generic.
> > 
> > What would be useful is a way for "on entering" parsers to return
> > "done with decoding" information to their callers.
> > 
> > This could be implemented by or'ing return value in the current semantics
> > with a flag with "done with decoding" meaning, e.g. RVAL_DONE.
> > 
> > If an ioctl parser returned RVAL_DONE, this would tell SYS_FUNC(ioctl)
> > that the decoding is finished but fallback decoding is needed, while
> > RVAL_DONE+1 would mean that the decoding is finished and no fallback
> > decoding is needed.
> 
> I've pushed this and other related changes along with some usage examples.

I'll have a look. Thanks.

> 
> 
> -- 
> ldv



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