Hi Daniele,
On Thu, Nov 10, 2022 at 04:56:51PM -0800, Daniele Ceraolo Spurio wrote:
> The fence is always initialized in huc_init_early, but the cleanup in
> huc_fini is only being run if HuC is enabled. This causes a leaking of
> the debug object when HuC is disabled/not supported, which can in turn
> trigger a warning if we try to register a new debug offset at the same
> address on driver reload.
>
> To fix the issue, make sure to always run the cleanup code.
>
> Reported-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
> Reported-by: Brian Norris <briannorris@xxxxxxxxxxxx>
> Fixes: 27536e03271d ("drm/i915/huc: track delayed HuC load with a fence")
> Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@xxxxxxxxx>
> Cc: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>
> Cc: Brian Norris <briannorris@xxxxxxxxxxxx>
> Cc: Alan Previn <alan.previn.teres.alexis@xxxxxxxxx>
> Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
> ---
>
> Note: I didn't manage to repro the reported warning, but I did confirm
> that we weren't correctly calling i915_sw_fence_fini and that this patch
> fixes that.
I *did* reproduce, and with this patch, I no longer reproduce. So:
Tested-by: Brian Norris <briannorris@xxxxxxxxxxxx>
I see this differs very slightly from the draft version (which didn't
work for me):
https://lore.kernel.org/all/ac5fde11-c17d-8574-c938-c2278d53cf95@xxxxxxxxx/
so presumably that diff is the fix.
Thanks a bunch!
Brian
> drivers/gpu/drm/i915/gt/uc/intel_huc.c | 12 +++++++-----
> drivers/gpu/drm/i915/gt/uc/intel_uc.c | 1 +
> 2 files changed, 8 insertions(+), 5 deletions(-)
