From: Erik Gilling <konk...@android.com>
If we hit a timeout, dump sync state to console
Cc: Maarten Lankhorst <maarten.lankho...@canonical.com>
Cc: Erik Gilling <konk...@android.com>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Rob Clark <robcl...@gmail.com>
Cc: Sumit Semwal <sumit.sem...@linaro.org>
Cc: Greg KH <gre...@linuxfoundation.org>
Cc: dri-de...@lists.freedesktop.org
Cc: Android Kernel Team <kernel-t...@android.com>
Signed-off-by: Erik Gilling <konk...@android.com>
[jstultz: Add commit message, whitespace fixups]
Signed-off-by: John Stultz <john.stu...@linaro.org>
---
drivers/staging/android/sync.c | 34 ++++++++++++++++++++++++++++++++--
1 file changed, 32 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c
index 7fccfcd..d54fa8d 100644
--- a/drivers/staging/android/sync.c
+++ b/drivers/staging/android/sync.c
@@ -31,6 +31,7 @@
static void sync_fence_signal_pt(struct sync_pt *pt);
static int _sync_pt_has_signaled(struct sync_pt *pt);
static void sync_fence_free(struct kref *kref);
+static void sync_dump(void);
static LIST_HEAD(sync_timeline_list_head);
static DEFINE_SPINLOCK(sync_timeline_list_lock);
@@ -574,8 +575,10 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
if (fence->status < 0)
return fence->status;
- if (fence->status == 0)
+ if (fence->status == 0) {
+ sync_dump();
return -ETIME;
+ }
return 0;
}
@@ -914,7 +917,34 @@ static __init int sync_debugfs_init(void)
debugfs_create_file("sync", S_IRUGO, NULL, NULL, &sync_debugfs_fops);
return 0;
}
-
late_initcall(sync_debugfs_init);
+#define DUMP_CHUNK 256
+static char sync_dump_buf[64 * 1024];
+void sync_dump(void)
+{
+ struct seq_file s = {
+ .buf = sync_dump_buf,
+ .size = sizeof(sync_dump_buf) - 1,
+ };
+ int i;
+
+ sync_debugfs_show(&s, NULL);
+
+ for (i = 0; i < s.count; i += DUMP_CHUNK) {
+ if ((s.count - i) > DUMP_CHUNK) {
+ char c = s.buf[i + DUMP_CHUNK];
+ s.buf[i + DUMP_CHUNK] = 0;
+ pr_cont("%s", s.buf + i);
+ s.buf[i + DUMP_CHUNK] = c;
+ } else {
+ s.buf[s.count] = 0;
+ pr_cont("%s", s.buf + i);
+ }
+ }
+}
+#else
+static void sync_dump(void)
+{
+}
#endif
--
1.7.10.4
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