Daniel Vetter
0ae6d7bc0e
drm/nouveau: try to protect nbo->pin_refcount ...
... by moving the bo_pin/bo_unpin manipulation of the pin_refcount
under the protection of the ttm reservation lock. pin/unpin seems
to get called from all over the place, so atm this is completely racy.
After this patch there are only a few places in cleanup functions
left which access ->pin_refcount without locking. But I'm hoping that
those are safe and some other code invariant guarantees that this
won't blow up.
In any case, I only need to fix up pin/unpin to make ->pageflip work
safely, so let's keep it at that.
Add a comment to the header to explain the new locking rule.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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