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| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-10 14:46:37 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-10-16 22:06:39 +0200 |
| commit | aa5f8021811aede2e40aa715c55fbd87d945a443 (patch) | |
| tree | a491c020dab146964f8ec6da84a47367b4dff7c1 /drivers/gpu/drm/i915/i915_gem.c | |
| parent | drm/i915: prevent tiling changes on framebuffer backing storage (diff) | |
| download | linux-aa5f8021811aede2e40aa715c55fbd87d945a443.tar.xz linux-aa5f8021811aede2e40aa715c55fbd87d945a443.zip | |
drm/i915: Use unsigned long for obj->user_pin_count
At least on linux sizeof(long) == sizeof(void*) and the thinking
is that you can grab about as many references as there's memory.
Doesn't really matter, just a bit of OCD since the fixed size data
type in a pure in-kernel datastructure look off.
v2: Ville asked for an overflow check since no one prevents userspace
from incrementing the pin count forever.
v3: s/INT/LONG/, noticed by Chris.
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index f10ae6498bce..34df59b660f8 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -3931,6 +3931,11 @@ i915_gem_pin_ioctl(struct drm_device *dev, void *data, goto out; } + if (obj->user_pin_count == ULONG_MAX) { + ret = -EBUSY; + goto out; + } + if (obj->user_pin_count == 0) { ret = i915_gem_obj_ggtt_pin(obj, args->alignment, true, false); if (ret) |