From 1aec09098d3c3729ed152aee9ee4e6e656fa7a3f Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 11 Feb 2018 18:52:47 +0000
Subject: igt/kms_frontbuffer_tracking: Disable FBC testing for -ENODEV

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 tests/kms_frontbuffer_tracking.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'tests/kms_frontbuffer_tracking.c')

diff --git a/tests/kms_frontbuffer_tracking.c b/tests/kms_frontbuffer_tracking.c
index 2622952c..6c4071de 100644
--- a/tests/kms_frontbuffer_tracking.c
+++ b/tests/kms_frontbuffer_tracking.c
@@ -1588,6 +1588,9 @@ static bool fbc_supported_on_chipset(void)
 	char buf[128];
 
 	debugfs_read("i915_fbc_status", buf);
+	if (*buf == '\0')
+		return false;
+
 	return !strstr(buf, "FBC unsupported on this chipset\n");
 }
 
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