From c2d2c7de972d7a08533bde622c36ff6feb112907 Mon Sep 17 00:00:00 2001
From: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Date: Thu, 1 Mar 2018 10:17:25 +0200
Subject: [PATCH] intel_th: Don't touch switch routing in host mode
Git-commit: c2d2c7de972d7a08533bde622c36ff6feb112907
Patch-mainline: v4.17-rc1
References: FATE#325099
When the Trace Hub is operating in Host Debugger mode, it is up to the
debugger to configure master routing even for the software sources. Do
not do this in the driver in this case.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/hwtracing/intel_th/core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/hwtracing/intel_th/core.c b/drivers/hwtracing/intel_th/core.c
index 8e4f5fd8a43e..d295b221e0bc 100644
--- a/drivers/hwtracing/intel_th/core.c
+++ b/drivers/hwtracing/intel_th/core.c
@@ -930,6 +930,10 @@ int intel_th_set_output(struct intel_th_device *thdev,
struct intel_th_device *hub = to_intel_th_hub(thdev);
struct intel_th_driver *hubdrv = to_intel_th_driver(hub->dev.driver);
+ /* In host mode, this is up to the external debugger, do nothing. */
+ if (hub->host_mode)
+ return 0;
+
if (!hubdrv->set_output)
return -ENOTSUPP;
--
2.20.1