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

Dmitry V. Levin ldv at altlinux.org
Thu Jul 9 02:19:33 UTC 2015

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.

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