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iris: Don't mark protected bo as reusable

José Roberto de Souza requested to merge zehortigoza/mesa:protected-cache into main

The check in alloc_bo_from_cache() was skiping any try to get a bo from cache but after use a protect bo was still being put in some cache bucket and could be used for cases that don't require a protected bo.

Using a protected bo in cases that don't require it can have performance implications.

So here returning NULL when trying to get a cache bucket for a protected bo, this will cause bo->real.reusable to be set to fall avoiding the bo to be reused.

Fixes: 9402ac80 ("iris: handle protected BO creation") Signed-off-by: José Roberto de Souza jose.souza@intel.com

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