From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 2 Oct 2017 10:04:16 +0000 (+0100)
Subject: drm/i915: Silence compiler warning for hsw_power_well_enable()
X-Git-Tag: v4.14-rc5~12^2^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=de3ded0ae677749b4fc9f59d15b26b9f077340ac;p=platform%2Fkernel%2Flinux-exynos.git

drm/i915: Silence compiler warning for hsw_power_well_enable()

Not all compilers are able to determine that pg is guarded by wait_fuses
and so may think that pg is used uninitialized.

Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Fixes: b2891eb2531e ("drm/i915/hsw+: Add has_fuses power well attribute")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171002100416.25865-1-chris@chris-wilson.co.uk
Reviewed-by: Imre Deak <imre.deak@intel.com>
(cherry picked from commit 320671f94ada80ff036cc9d5dcd730ba4f3e0f1a)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
---

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index b3a087c..49577eb 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.c
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
@@ -368,7 +368,7 @@ static void hsw_power_well_enable(struct drm_i915_private *dev_priv,
 {
 	enum i915_power_well_id id = power_well->id;
 	bool wait_fuses = power_well->hsw.has_fuses;
-	enum skl_power_gate pg;
+	enum skl_power_gate uninitialized_var(pg);
 	u32 val;
 
 	if (wait_fuses) {