From 2f59f1b33a84447247b21be60ecf05080ce2982a Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 7 Nov 2017 14:53:34 +0000
Subject: [PATCH] drm/i915: Silence compiler for csr_load_work_fn()
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Git-commit: 2f59f1b33a84447247b21be60ecf05080ce2982a
Patch-mainline: v4.16-rc1
References: FATE#322643 bsc#1055900

gcc-4.7 is not very smart and can not tell that "si" is guarded by size
being 0. So it complains,

Drivers/gpu/drm/i915/intel_csr.c: In function ‘csr_load_work_fn’:
drivers/gpu/drm/i915/intel_csr.c:204:3: warning: ‘si’ may be used uninitialized in this function [-Wmaybe-uninitialized]
drivers/gpu/drm/i915/intel_csr.c:190:30: note: ‘si’ was declared in

Give in and mark si as NULL.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171107145334.27154-1-chris@chris-wilson.co.uk
Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_csr.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -198,6 +198,7 @@ intel_get_stepping_info(struct drm_i915_
 		si = bxt_stepping_info;
 	} else {
 		size = 0;
+		si = NULL;
 	}
 
 	if (INTEL_REVID(dev_priv) < size)