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| author | Takashi Iwai <tiwai@suse.de> | 2014-06-13 15:14:34 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-06-16 10:34:06 +0200 |
| commit | 74b0c2d75fb4cc89173944e6d8f9eb47aca0c343 (patch) | |
| tree | fa5d2e9b60d699e7d22e9f1b128f0299452e20a4 /drivers/gpu | |
| parent | 7171511eaec5bf23fb06078f59784a3a0626b38f (diff) | |
| download | linux-0-day-74b0c2d75fb4cc89173944e6d8f9eb47aca0c343.tar.gz linux-0-day-74b0c2d75fb4cc89173944e6d8f9eb47aca0c343.tar.xz | |
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>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_pm.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index d1e53abec1b5f..6463f0201cf22 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -6024,30 +6024,32 @@ void intel_display_power_put(struct drm_i915_private *dev_priv, static struct i915_power_domains *hsw_pwr; /* Display audio driver power well request */ -void i915_request_power_well(void) +int i915_request_power_well(void) { struct drm_i915_private *dev_priv; - if (WARN_ON(!hsw_pwr)) - return; + if (!hsw_pwr) + return -ENODEV; dev_priv = container_of(hsw_pwr, struct drm_i915_private, power_domains); intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO); + return 0; } EXPORT_SYMBOL_GPL(i915_request_power_well); /* Display audio driver power well release */ -void i915_release_power_well(void) +int i915_release_power_well(void) { struct drm_i915_private *dev_priv; - if (WARN_ON(!hsw_pwr)) - return; + if (!hsw_pwr) + return -ENODEV; dev_priv = container_of(hsw_pwr, struct drm_i915_private, power_domains); intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO); + return 0; } EXPORT_SYMBOL_GPL(i915_release_power_well); |