diff options
| author | Michel Dänzer <michel@tungstengraphics.com> | 2007-06-15 17:13:11 +0200 |
|---|---|---|
| committer | Michel Dänzer <michel@tungstengraphics.com> | 2007-06-15 17:13:11 +0200 |
| commit | 3d5d41fa9823cf44138c8f4bc954bca80539d74e (patch) | |
| tree | 7f060a0348405663e8a9a00e26a90dcc58cf21b3 /shared-core/i915_dma.c | |
| parent | 84bea383538df83c049680497ba2179e50d07ca3 (diff) | |
i915: Fix handling of breadcrumb counter wraparounds.
Diffstat (limited to 'shared-core/i915_dma.c')
| -rw-r--r-- | shared-core/i915_dma.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/shared-core/i915_dma.c b/shared-core/i915_dma.c index ebb184cc..dbc5f959 100644 --- a/shared-core/i915_dma.c +++ b/shared-core/i915_dma.c @@ -445,10 +445,12 @@ void i915_emit_breadcrumb(drm_device_t *dev) drm_i915_private_t *dev_priv = dev->dev_private; RING_LOCALS; - dev_priv->sarea_priv->last_enqueue = ++dev_priv->counter; + if (++dev_priv->counter > BREADCRUMB_MASK) { + dev_priv->counter = 1; + DRM_DEBUG("Breadcrumb counter wrapped around\n"); + } - if (dev_priv->counter > 0x7FFFFFFFUL) - dev_priv->sarea_priv->last_enqueue = dev_priv->counter = 1; + dev_priv->sarea_priv->last_enqueue = dev_priv->counter; BEGIN_LP_RING(4); OUT_RING(CMD_STORE_DWORD_IDX); |