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Check pointer for NULL before dereferencing it, not after.

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PR:		138383
Submitted by:	Patroklos Argyroudis <argp@census-labs.com>
Reviewed by:	rnoland
MFC after:	1 week
This commit is contained in:
brueffer 2009-10-21 15:54:45 +00:00
parent edb3a69fdb
commit 629bb93ae9
1 changed files with 2 additions and 1 deletions
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3
sys/dev/drm/mach64_state.c
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@ -826,7 +826,7 @@ int mach64_dma_vertex(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
drm_mach64_private_t *dev_priv = dev->dev_private;
drm_mach64_sarea_t *sarea_priv = dev_priv->sarea_priv;
drm_mach64_sarea_t *sarea_priv;
drm_mach64_vertex_t *vertex = data;
LOCK_TEST_WITH_RETURN(dev, file_priv);
@ -835,6 +835,7 @@ int mach64_dma_vertex(struct drm_device *dev, void *data,
DRM_ERROR("called with no initialization\n");
return -EINVAL;
}
sarea_priv = dev_priv->sarea_priv;
DRM_DEBUG("pid=%d buf=%p used=%lu discard=%d\n",
DRM_CURRENTPID,