i810/i830 bug with Jon's file operations changes

1 files changed, 14 insertions, 2 deletions

diff --git a/linux-core/i830_dma.c b/linux-core/i830_dma.c
index 1ff1b5a2..454d82a3 100644
--- a/linux-core/i830_dma.c
+++ b/linux-core/i830_dma.c
@@ -111,7 +111,8 @@ static int i830_freelist_put(drm_device_t * dev, drm_buf_t * buf)
 	return 0;
 }
 
-int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
+
+static int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 {
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev;
@@ -139,12 +140,21 @@ int i830_mmap_buffers(struct file *filp, struct vm_area_struct *vma)
 	return 0;
 }
 
+static struct file_operations i830_buffer_fops = {
+	.open = drm_open,
+	.release = drm_release,
+	.ioctl = drm_ioctl,
+	.mmap = i830_mmap_buffers,
+	.fasync = drm_fasync,
+};
+
 static int i830_map_buffer(drm_buf_t * buf, struct file *filp)
 {
 	drm_file_t *priv = filp->private_data;
 	drm_device_t *dev = priv->head->dev;
 	drm_i830_buf_priv_t *buf_priv = buf->dev_private;
 	drm_i830_private_t *dev_priv = dev->dev_private;
+	struct file_operations *old_fops;
 	unsigned long virtual;
 	int retcode = 0;
 
@@ -152,11 +162,13 @@ static int i830_map_buffer(drm_buf_t * buf, struct file *filp)
 		return -EINVAL;
 
 	down_write(&current->mm->mmap_sem);
+	old_fops = filp->f_op;
+	filp->f_op = &i830_buffer_fops;
 	dev_priv->mmap_buffer = buf;
 	virtual = do_mmap(filp, 0, buf->total, PROT_READ | PROT_WRITE,
 			  MAP_SHARED, buf->bus_address);
 	dev_priv->mmap_buffer = NULL;
-
+	filp->f_op = old_fops;
 	if (IS_ERR((void *)virtual)) {	/* ugh */
 		/* Real error */
 		DRM_ERROR("mmap error\n");