Make drm_sg_free callable in-kernel.

2 files changed, 22 insertions, 12 deletions

diff --git a/linux-core/drmP.h b/linux-core/drmP.h
index 2bbc6200..ebb530bc 100644
--- a/linux-core/drmP.h
+++ b/linux-core/drmP.h
@@ -1135,8 +1135,9 @@ extern void drm_sg_cleanup(drm_sg_mem_t * entry);
 extern int drm_sg_alloc_ioctl(struct inode *inode, struct file *filp,
 			unsigned int cmd, unsigned long arg);
 extern int drm_sg_alloc(drm_device_t *dev, drm_scatter_gather_t * request);
-extern int drm_sg_free(struct inode *inode, struct file *filp,
-		       unsigned int cmd, unsigned long arg);
+extern int drm_sg_free(struct drm_device *dev, unsigned long handle);
+extern int drm_sg_free_ioctl(struct inode *inode, struct file *filp,
+			     unsigned int cmd, unsigned long arg);
 
 			       /* ATI PCIGART support (ati_pcigart.h) */
 extern int drm_ati_pcigart_init(drm_device_t * dev, drm_ati_pcigart_info *gart_info);
diff --git a/linux-core/drm_scatter.c b/linux-core/drm_scatter.c
index c0d6db24..5581dc0b 100644
--- a/linux-core/drm_scatter.c
+++ b/linux-core/drm_scatter.c
@@ -203,6 +203,7 @@ int drm_sg_alloc_ioctl(struct inode *inode, struct file *filp,
 
 	if (copy_to_user(argp, &request, sizeof(request))) {
 		drm_sg_cleanup(priv->head->dev->sg);
+		priv->head->dev->sg = NULL;
 		return -EFAULT;
 	}
 
@@ -211,26 +212,18 @@ int drm_sg_alloc_ioctl(struct inode *inode, struct file *filp,
 
 }
 
-int drm_sg_free(struct inode *inode, struct file *filp,
-		unsigned int cmd, unsigned long arg)
+int drm_sg_free(struct drm_device *dev, unsigned long handle)
 {
-	drm_file_t *priv = filp->private_data;
-	drm_device_t *dev = priv->head->dev;
-	drm_scatter_gather_t request;
 	drm_sg_mem_t *entry;
 
 	if (!drm_core_check_feature(dev, DRIVER_SG))
 		return -EINVAL;
 
-	if (copy_from_user(&request,
-			   (drm_scatter_gather_t __user *) arg,
-			   sizeof(request)))
-		return -EFAULT;
 
 	entry = dev->sg;
 	dev->sg = NULL;
 
-	if (!entry || entry->handle != request.handle)
+	if (!entry || entry->handle != handle)
 		return -EINVAL;
 
 	DRM_DEBUG("sg free virtual  = %p\n", entry->virtual);
@@ -239,3 +232,19 @@ int drm_sg_free(struct inode *inode, struct file *filp,
 
 	return 0;
 }
+
+EXPORT_SYMBOL(drm_sg_free);
+
+int drm_sg_free_ioctl(struct inode *inode, struct file *filp,
+		      unsigned int cmd, unsigned long arg)
+{
+	struct drm_file *priv = filp->private_data;
+	struct drm_device *dev = priv->head->dev;
+	struct drm_scatter_gather __user *argp = (void __user *)arg;
+	struct drm_scatter_gather request;
+
+	if (copy_from_user(&request, argp, sizeof(request)))
+		return -EFAULT;
+
+	return drm_sg_free(dev, request.handle);
+}