From 640cde65b48ae6c773f00cbbdece7e67945b3f34 Mon Sep 17 00:00:00 2001
From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Date: Wed, 3 Apr 2019 07:44:07 +0100
Subject: [PATCH] drm/i915: Fix uninitialized mask in
 intel_device_info_subplatform_init
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Mask need to be initialized to zero since device id checks may not match.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Fixes: 805446c8347c ("drm/i915: Introduce concept of a sub-platform")
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Jose Souza <jose.souza@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190403064407.25646-1-tvrtko.ursulin@linux.intel.com
---
 drivers/gpu/drm/i915/intel_device_info.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_device_info.c b/drivers/gpu/drm/i915/intel_device_info.c
index 0ed49d032c00..6af480b95bc6 100644
--- a/drivers/gpu/drm/i915/intel_device_info.c
+++ b/drivers/gpu/drm/i915/intel_device_info.c
@@ -778,7 +778,7 @@ void intel_device_info_subplatform_init(struct drm_i915_private *i915)
 	const unsigned int pi = __platform_mask_index(rinfo, info->platform);
 	const unsigned int pb = __platform_mask_bit(rinfo, info->platform);
 	u16 devid = INTEL_DEVID(i915);
-	u32 mask;
+	u32 mask = 0;
 
 	/* Make sure IS_<platform> checks are working. */
 	RUNTIME_INFO(i915)->platform_mask[pi] = BIT(pb);
-- 
2.30.2