From: Chris Wilson <chris@chris-wilson.co.uk>
To: Wolfram Sang <w.sang@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: add check for valid init_clock_gating-pointer
Date: Sun, 19 Jun 2011 21:04:29 +0100 [thread overview]
Message-ID: <013811$h8fkv@fmsmga002.fm.intel.com> (raw)
In-Reply-To: <20110619192211.GA23889@pengutronix.de>
On Sun, 19 Jun 2011 21:22:11 +0200, Wolfram Sang <w.sang@pengutronix.de> wrote:
> On Thu, Jun 16, 2011 at 04:47:53PM +0100, Chris Wilson wrote:
> > On Thu, 16 Jun 2011 08:15:57 -0700, Jesse Barnes <jbarnes@virtuousgeek.org> wrote:
> > > On Thu, 16 Jun 2011 15:28:46 +0200
> > > Wolfram Sang <w.sang@pengutronix.de> wrote:
> > > > How about BUG_ON(!ptr) in the init-routine for a bit more grace? And/or
> > > > a warning in the else-block? It seems to happen to users...
> > >
> > > Yeah, a BUG_ON would be fine.
> >
> > if (WARN_ON(!ptr, "no display vtable"))
> > return -ENODEV;
>
> That would mean converting the involved void-functions to int to propagate the
> error (intel_init_clock_gating, intel_modeset_init). Not a big deal, but quite
> intrusive. Do you really mean that?
A choice between a BUG_ON and error propagation? Choose error propagation,
one day it will be for real. ;-)
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
next prev parent reply other threads:[~2011-06-19 20:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-15 22:24 [PATCH] drm/i915: add check for valid init_clock_gating-pointer Wolfram Sang
2011-06-15 22:30 ` Jesse Barnes
2011-06-16 13:28 ` Wolfram Sang
2011-06-16 15:15 ` Jesse Barnes
2011-06-16 15:47 ` Chris Wilson
2011-06-19 19:22 ` Wolfram Sang
2011-06-19 20:04 ` Chris Wilson [this message]
2011-06-20 16:10 ` [PATCH] drm/i915: gracefully bail out when init_clock_gating-pointer is not set Wolfram Sang
2011-06-20 16:43 ` Chris Wilson
2011-06-20 17:36 ` [PATCH V2] " Wolfram Sang
2011-06-20 17:38 ` Jesse Barnes
2011-07-02 15:55 ` Wolfram Sang
2011-07-02 18:00 ` Jesse Barnes
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