[PATCH 01/16] drm: do not push inode down into drm_open_helper

[Ilija Hadzic]

Push minor number instead. This is a preparatory
patch for introducing render nodes. It has been derived
from 7c5cc4f63556e351e9e5980ed22accad410e3fdc originally
created by Dave Airlie.

Signed-off-by: Ilija Hadzic <ihadzic at research.bell-labs.com>
---
 drivers/gpu/drm/drm_fops.c |   19 ++++++++++---------
 1 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 6263b01..98cb064 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -43,8 +43,8 @@
 DEFINE_MUTEX(drm_global_mutex);
 EXPORT_SYMBOL(drm_global_mutex);
 
-static int drm_open_helper(struct inode *inode, struct file *filp,
-			   struct drm_device * dev);
+static int drm_open_helper(struct file *filp,
+			   struct drm_minor *minor);
 
 static int drm_setup(struct drm_device * dev)
 {
@@ -133,7 +133,7 @@ int drm_open(struct inode *inode, struct file *filp)
 	if (!(dev = minor->dev))
 		return -ENODEV;
 
-	retcode = drm_open_helper(inode, filp, dev);
+	retcode = drm_open_helper(filp, minor);
 	if (!retcode) {
 		atomic_inc(&dev->counts[_DRM_STAT_OPENS]);
 		if (!dev->open_count++)
@@ -226,10 +226,10 @@ static int drm_cpu_valid(void)
  * Creates and initializes a drm_file structure for the file private data in \p
  * filp and add it into the double linked list in \p dev.
  */
-static int drm_open_helper(struct inode *inode, struct file *filp,
-			   struct drm_device * dev)
+static int drm_open_helper(struct file *filp,
+			   struct drm_minor *minor)
 {
-	int minor_id = iminor(inode);
+	struct drm_device *dev = minor->dev;
 	struct drm_file *priv;
 	int ret;
 
@@ -240,7 +240,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 	if (dev->switch_power_state != DRM_SWITCH_POWER_ON)
 		return -EINVAL;
 
-	DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
+	DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor->index);
 
 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
@@ -250,7 +250,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 	priv->filp = filp;
 	priv->uid = current_euid();
 	priv->pid = task_pid_nr(current);
-	priv->minor = idr_find(&drm_minors_idr, minor_id);
+	priv->minor = minor;
 	priv->ioctl_count = 0;
 	/* for compatibility root is always authenticated */
 	priv->authenticated = capable(CAP_SYS_ADMIN);
@@ -558,7 +558,8 @@ int drm_release(struct inode *inode, struct file *filp)
 	}
 
 	/* drop the reference held my the file priv */
-	drm_master_put(&file_priv->master);
+	if (file_priv->master)
+		drm_master_put(&file_priv->master);
 	file_priv->is_master = 0;
 	list_del(&file_priv->lhead);
 	mutex_unlock(&dev->struct_mutex);
-- 
1.7.8.5