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Subject: v4l2-compliance: improve failure message
Author:  Hans Verkuil <hverkuil-ci...@xs4all.nl>
Date:    Tue Nov 9 12:40:09 2021 +0100

Show the exact values for the exp_q.g_length(p) < buf.g_length(p)
check.

Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>

 utils/v4l2-compliance/v4l2-test-buffers.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

---

http://git.linuxtv.org/cgit.cgi/v4l-utils.git/commit/?id=e14b30c51b2426ffcd933878963e39a02beab44f
diff --git a/utils/v4l2-compliance/v4l2-test-buffers.cpp 
b/utils/v4l2-compliance/v4l2-test-buffers.cpp
index 7f9ee1533d9e..c3929c9f4573 100644
--- a/utils/v4l2-compliance/v4l2-test-buffers.cpp
+++ b/utils/v4l2-compliance/v4l2-test-buffers.cpp
@@ -1820,7 +1820,9 @@ static int setupDmaBuf(struct node *expbuf_node, struct 
node *node,
                fail_on_test(buf.check(q, Unqueued, i));
                fail_on_test(exp_q.g_num_planes() < buf.g_num_planes());
                for (unsigned p = 0; p < buf.g_num_planes(); p++) {
-                       fail_on_test(exp_q.g_length(p) < buf.g_length(p));
+                       if (exp_q.g_length(p) < buf.g_length(p))
+                               fail("exp_q.g_length(%u) < buf.g_length(%u): %u 
< %u\n",
+                                    p, p, exp_q.g_length(p), buf.g_length(p));
                        // This should not work!
                        fail_on_test(node->mmap(buf.g_length(p), 0) != 
MAP_FAILED);
                        q.s_fd(i, p, exp_q.g_fd(i, p));

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