On 23/07/2020 20:51, Chris Wilson wrote:
The flags passed to the wait_entry.func are passed onwards to
try_to_wake_up(), which has a very particular interpretation for its
wake_flags. In particular, beyond the published WF_SYNC, it has a few
internal flags as well. Since we passed the fence->error down the chain
via the flags argument, these ended up in the default_wake_function
confusing the kernel/sched.
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2110
Fixes: ef4688497512 ("drm/i915: Propagate fence errors")
Signed-off-by: Chris Wilson <[email protected]>
Cc: Matthew Auld <[email protected]>
Cc: <[email protected]> # v5.4+
Reviewed-by: Matthew Auld <[email protected]>
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