From: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Date: Wed, 31 Jan 2018 11:44:37 +0530
Subject: drm/i915/guc: Fix return from guc_log_relay_file_create
Git-commit: b1852d362f31ac0c233e7c7b040f7c58bd381267
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

guc_log_relay_file_create will return -EEXIST if we invoke
relay_late_setup_files multiple times as part of i915_guc_log_control.
However this is to be not cosidered as fail and need to return 0.
This was mistakenly introduced in the below commit. Fix it.

Fixes: 70deeaddc6e6 "drm/i915/guc: Fix lockdep due to log relay channel handling under struct_mutex"
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1517379279-12967-1-git-send-email-sagar.a.kamble@intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/i915/intel_guc_log.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/i915/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/intel_guc_log.c
@@ -185,6 +185,8 @@ static int guc_log_relay_file_create(str
 		goto out_unlock;
 	}
 
+	ret = 0;
+
 out_unlock:
 	mutex_unlock(&guc->log.runtime.relay_lock);
 	return ret;