From 3d5d41fa9823cf44138c8f4bc954bca80539d74e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Michel=20D=C3=A4nzer?= Date: Fri, 15 Jun 2007 17:13:11 +0200 Subject: i915: Fix handling of breadcrumb counter wraparounds. --- shared-core/i915_dma.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'shared-core/i915_dma.c') 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); -- cgit v1.2.3