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drm/vmwgfx: Don't refcount cotable lookups during command buffer validation

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The typical pattern of these lookups are
-Lookup
-Put on validate list if not already there.
-Unreference
And since we are the exclusive user of the context during lookup time,
we can be sure that the resource will stay alive during the sequence.
So avoid taking a reference during lookup, and also avoid unreferencing
when done. There are two users outside of command buffer validation and
those are refcounted explicitly.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom 2018-09-26 16:29:49 +02:00
parent 508108ea27
commit 1b9a01d62c
4 changed files with 6 additions and 10 deletions
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3
drivers/gpu/drm/vmwgfx/vmwgfx_shader.c
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@ -636,7 +636,8 @@ int vmw_dx_shader_add(struct vmw_cmdbuf_res_manager *man,
res = &shader->res;
shader->ctx = ctx;
shader->cotable = vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER);
shader->cotable = vmw_resource_reference
(vmw_context_cotable(ctx, SVGA_COTABLE_DXSHADER));
shader->id = user_key;
shader->committed = false;
INIT_LIST_HEAD(&shader->cotable_head);