[Intel-gfx] [PATCH] drm/i915/gem: Only call eb_lookup_vma once during execbuf ioctl

[Chris Wilson]

As we no longer stash anything inside i915_vma under the exclusive
protection of struct_mutex, we do not need to revoke the i915_vma
stashes before dropping struct_mutex to handle pagefaults.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 0df41d43fbba..4fec8e3ae440 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -866,14 +866,6 @@ static void eb_release_vmas(const struct i915_execbuffer *eb)
 	}
 }
 
-static void eb_reset_vmas(const struct i915_execbuffer *eb)
-{
-	eb_release_vmas(eb);
-	if (eb->lut_size > 0)
-		memset(eb->buckets, 0,
-		       sizeof(struct hlist_head) << eb->lut_size);
-}
-
 static void eb_destroy(const struct i915_execbuffer *eb)
 {
 	GEM_BUG_ON(eb->reloc_cache.rq);
@@ -1689,7 +1681,6 @@ static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
 	}
 
 	/* We may process another execbuffer during the unlock... */
-	eb_reset_vmas(eb);
 	mutex_unlock(&dev->struct_mutex);
 
 	/*
@@ -1728,11 +1719,6 @@ static noinline int eb_relocate_slow(struct i915_execbuffer *eb)
 		goto out;
 	}
 
-	/* reacquire the objects */
-	err = eb_lookup_vmas(eb);
-	if (err)
-		goto err;
-
 	GEM_BUG_ON(!eb->batch);
 
 	list_for_each_entry(ev, &eb->relocs, reloc_link) {
-- 
2.24.0