diff options
| author | Erik Gilling <konkers@android.com> | 2013-02-28 16:43:15 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-04 17:44:08 +0800 |
| commit | f56388f3bd15a853d5718bf31c5d4dbc8f499cbe (patch) | |
| tree | e6adcf5c49a48b82c169297ccbd97527501d5339 /drivers/staging/android/sync.c | |
| parent | 3b640f5dd050f972439e5c67ba618a5377b61d34 (diff) | |
staging: sync: Dump sync state to console on timeout
If we hit a timeout, dump sync state to console
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Erik Gilling <konkers@android.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rob Clark <robclark@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: dri-devel@lists.freedesktop.org
Cc: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Erik Gilling <konkers@android.com>
[jstultz: Add commit message, whitespace fixups]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/android/sync.c')
| -rw-r--r-- | drivers/staging/android/sync.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/drivers/staging/android/sync.c b/drivers/staging/android/sync.c index 7fccfcdd9772..d54fa8dd5341 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 |