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dma-buf: cleanup dma_fence_describe v3

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The driver and timeline name are meaningless for signaled fences.

Drop them and also print the context number.

v2: avoid the calls when the BO is already signaled.
v3: use same format as trace points for context and seqno.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Link: https://lore.kernel.org/r/20251113145332.16805-2-christian.koenig@amd.com
This commit is contained in:
Christian König
2025-10-10 14:22:06 +02:00
parent 17331d0f33
commit ac364014fd
1 changed files with 11 additions and 9 deletions
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20
drivers/dma-buf/dma-fence.c
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@@ -997,19 +997,21 @@ EXPORT_SYMBOL(dma_fence_set_deadline);
*/
void dma_fence_describe(struct dma_fence *fence, struct seq_file *seq)
{
const char __rcu *timeline;
const char __rcu *driver;
const char __rcu *timeline = "";
const char __rcu *driver = "";
const char *signaled = "";
rcu_read_lock();
timeline = dma_fence_timeline_name(fence);
driver = dma_fence_driver_name(fence);
if (!dma_fence_is_signaled(fence)) {
timeline = dma_fence_timeline_name(fence);
driver = dma_fence_driver_name(fence);
signaled = "un";
}
seq_printf(seq, "%s %s seq %llu %ssignalled\n",
rcu_dereference(driver),
rcu_dereference(timeline),
fence->seqno,
dma_fence_is_signaled(fence) ? "" : "un");
seq_printf(seq, "%llu:%llu %s %s %ssignalled\n",
fence->context, fence->seqno, timeline, driver,
signaled);
rcu_read_unlock();
}