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drm/lease: Check for lessor outside of locks 

The lessor is invariant over a lifetime of a lease, we don't have to
grab any locks for that. Speeds up the common case of not being a lease.

Cc: Keith Packard <keithp@keithp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20190228144910.26488-5-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2019-02-28 15:49:07 +01:00
parent 4285c7e1aa
commit 46b757780d
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/drm_lease.c
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@ -111,7 +111,7 @@ static bool _drm_has_leased(struct drm_master *master, int id)
*/
bool _drm_lease_held(struct drm_file *file_priv, int id)
{
if (file_priv == NULL || file_priv->master == NULL)
if (!file_priv || !file_priv->master)
return true;
return _drm_lease_held_master(file_priv->master, id);
@ -133,7 +133,7 @@ bool drm_lease_held(struct drm_file *file_priv, int id)
struct drm_master *master;
bool ret;
if (file_priv == NULL || file_priv->master == NULL)
if (!file_priv || !file_priv->master || !file_priv->master->lessor)
return true;
master = file_priv->master;
@ -159,7 +159,7 @@ uint32_t drm_lease_filter_crtcs(struct drm_file *file_priv, uint32_t crtcs_in)
int count_in, count_out;
uint32_t crtcs_out = 0;
if (file_priv == NULL || file_priv->master == NULL)
if (!file_priv || !file_priv->master || !file_priv->master->lessor)
return crtcs_in;
master = file_priv->master;