From 987bcd9a5b51db312588163d7f9a21654eb799e4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@linux.intel.com>
Date: Mon, 21 Oct 2013 19:37:33 +0300
Subject: [PATCH] lib: Allow pipe_crc_free(NULL)
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Prevent pipe_crc_free() from segfaulting on NULL ptr.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 lib/igt_debugfs.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index ca34c1e9..73d79230 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -197,6 +197,9 @@ void igt_pipe_crc_reset(void)
 
 void igt_pipe_crc_free(igt_pipe_crc_t *pipe_crc)
 {
+	if (!pipe_crc)
+		return;
+
 	close(pipe_crc->ctl_fd);
 	close(pipe_crc->crc_fd);
 	free(pipe_crc);