tree fa5d2e9b60d699e7d22e9f1b128f0299452e20a4
parent 7171511eaec5bf23fb06078f59784a3a0626b38f
author Takashi Iwai <tiwai@suse.de> 1402665274 +0200
committer Takashi Iwai <tiwai@suse.de> 1402907646 +0200

drm/i915, HD-audio: Don't continue probing when nomodeset is given

When a machine is booted with nomodeset option, i915 driver skips the
whole initialization.  Meanwhile, HD-audio tries to bind wth i915 just
by request_symbol() without knowing that the initialization was
skipped, and eventually it hits WARN_ON() in i915_request_power_well()
and i915_release_power_well() wrongly but still continues probing,
even though it doesn't work at all.

In this patch, both functions are changed to return an error in case
of uninitialized state instead of WARN_ON(), so that HD-audio driver
can give up HDMI controller initialization at the right time.

Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org> [3.15]
Signed-off-by: Takashi Iwai <tiwai@suse.de>