drm/i915: Add ww locking to dma-buf ops, v2.

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vmap is using pin_pages, but needs to use ww locking,
add pin_pages_unlocked to correctly lock the mapping.

Also add ww locking to begin/end cpu access.

Changes since v1:
- Fix i915_gem_map_dma_buf by using pin_pages_unlocked().

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210323155059.628690-38-maarten.lankhorst@linux.intel.com

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Maarten Lankhorst 2021-03-23 16:50:26 +01:00 • committed by Daniel Vetter

parent c858ffa177

commit e944e3cf58

1 changed files with 34 additions and 28 deletions

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drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c

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