A magic -1 is a obscure, especially since it's actually passed as an
unsigned, so depens upon the magic sign extension rules in C. This has
been added in
commit 3727d55e4d85836aa6cb759a965daaef88074150
Author: Jesse Barnes <jbarnes at virtuousgeek.org>
Date: Wed May 8 10:45:14 2013 -0700
drm/i915: allow stolen, pre-allocated objects to avoid GTT allocation v2
Use a proper #define instead. Spotted while reviewing Ben's
drm_mm_create_block changes.
Cc: Ben Widawsky <ben at bwidawsk.net>
Cc: Jesse Barnes <jbarnes at virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/i915_drv.h | 1 +
drivers/gpu/drm/i915/i915_gem_stolen.c | 2 +-
drivers/gpu/drm/i915/intel_pm.c | 2 +-
3 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 102e6b2..4dee6df 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1197,6 +1197,7 @@ enum hdmi_force_audio {
};
#define I915_GTT_RESERVED ((struct drm_mm_node *)0x1)
+#define I915_GTT_OFFSET_NONE (0xffffffffUL)
struct drm_i915_gem_object_ops {
/* Interface between the GEM object and its backing storage.
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 8e02344..0f18d75 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -360,7 +360,7 @@ i915_gem_object_create_stolen_for_preallocated(struct drm_device *dev,
}
/* Some objects just need physical mem from stolen space */
- if (gtt_offset == -1)
+ if (gtt_offset == I915_GTT_OFFSET_NONE)
return obj;
/* To simplify the initialisation sequence between KMS and GTT,
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5b4ade6..bbf0531 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3481,7 +3481,7 @@ static void valleyview_setup_pctx(struct drm_device *dev)
pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
pcbr_offset,
- -1,
+ I915_GTT_OFFSET_NONE,
pctx_size);
goto out;
}
--
1.7.11.7
