[igt-dev] [PATCH i-g-t 1/2] lib/igt_debugfs: Fix igt_pipe_get_crcs.

[Maarten Lankhorst]

read_crc returns an error instead of 0 on timeout now, so handle
this correctly. This is a small error introduced in

commit 7d48c0252c384d18318de89c54817bdfe9c832fc
Author: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Date:   Fri Feb 2 13:34:25 2018 +0100

    lib/igt_debugfs: Add igt_pipe_crc_get_single and igt_pipe_crc_drain, v4.

It causes the kms_chv_cursor_fail to take 27 minutes, so fix this..

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 lib/igt_debugfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/igt_debugfs.c b/lib/igt_debugfs.c
index e2b15f9bda0b..4a119985f102 100644
--- a/lib/igt_debugfs.c
+++ b/lib/igt_debugfs.c
@@ -794,10 +794,11 @@ igt_pipe_crc_get_crcs(igt_pipe_crc_t *pipe_crc, int n_crcs,
 		int ret;
 
 		ret = read_crc(pipe_crc, crc);
+		if (ret == -EAGAIN)
+			break;
+
 		if (ret < 0)
 			continue;
-		if (ret == 0)
-			break;
 
 		n++;
 	} while (n < n_crcs);
-- 
2.16.1