[Intel-gfx] [PATCH v2] drm/i915: Tune down init error message due to failure injection

[Chris Wilson]

On Thu, Mar 17, 2016 at 09:50:19PM +0200, Imre Deak wrote:
> On Thu, 2016-03-17 at 19:41 +0000, Chris Wilson wrote:
> > On Thu, Mar 17, 2016 at 06:08:05PM +0200, Imre Deak wrote:
> > > On Thu, 2016-03-17 at 15:55 +0000, Chris Wilson wrote:
> > > > 80cols rules still apply to messages :)
> > > > 
> > > > "Device initialization failed (%d). "
> > > > "Please file a bug at https://bugs.freedesktop.org/enter_bug.cgi
> > > > "
> > > > "against DRI/DRM/Intel providing the dmesg log by booting "
> > > > "with drm.debug=0xf\n",
> > > 
> > > I thought for strings emitted to dmesg it's discouraged, since you
> > > can't easily grep then. But I can make the link more precise.
> > 
> > Hmm, we haven't abided by that. I don't mind really :)
> 
> Ok, will follow this rule then.
> 
> > > > I would personally make i915_load_error() a proper function and
> > > > add
> > > > the "Please..." output there at a lower logging level than ERROR.
> > > 
> > > Using a function is not straightforward since there is no vprintf
> > > like
> > > interface for DRM_ERROR. But I can move that part of the message to
> > > macro.
> > 
> > In that case, I'm happy enough with ditching the DRM_ERROR here and
> > go
> > with dev_err(). Another nail in the DRM_ERROR coffin.
> 
> Hm, there doesn't seem to be vprintf like dev_err either. And dev_dbg
> depends on CONFIG_DEBUG while DRM_DEBUG doesn't.

It uses dev_printk_emit(KERN_ERR, dev, fmt, va_list) underneath.

Does that help?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre