drm: reorganise minor number handling using backported modesetting code.
rips out the head crap and replaces it with an idr and drm_minor structure
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/char/drm/drm_fops.c b/drivers/char/drm/drm_fops.c
index f09d4b5..df7bf48 100644
--- a/drivers/char/drm/drm_fops.c
+++ b/drivers/char/drm/drm_fops.c
@@ -129,16 +129,15 @@
int drm_open(struct inode *inode, struct file *filp)
{
struct drm_device *dev = NULL;
- int minor = iminor(inode);
+ int minor_id = iminor(inode);
+ struct drm_minor *minor;
int retcode = 0;
- if (!((minor >= 0) && (minor < drm_cards_limit)))
+ minor = idr_find(&drm_minors_idr, minor_id);
+ if (!minor)
return -ENODEV;
- if (!drm_heads[minor])
- return -ENODEV;
-
- if (!(dev = drm_heads[minor]->dev))
+ if (!(dev = minor->dev))
return -ENODEV;
retcode = drm_open_helper(inode, filp, dev);
@@ -168,19 +167,18 @@
int drm_stub_open(struct inode *inode, struct file *filp)
{
struct drm_device *dev = NULL;
- int minor = iminor(inode);
+ struct drm_minor *minor;
+ int minor_id = iminor(inode);
int err = -ENODEV;
const struct file_operations *old_fops;
DRM_DEBUG("\n");
- if (!((minor >= 0) && (minor < drm_cards_limit)))
+ minor = idr_find(&drm_minors_idr, minor_id);
+ if (!minor)
return -ENODEV;
- if (!drm_heads[minor])
- return -ENODEV;
-
- if (!(dev = drm_heads[minor]->dev))
+ if (!(dev = minor->dev))
return -ENODEV;
old_fops = filp->f_op;
@@ -225,7 +223,7 @@
static int drm_open_helper(struct inode *inode, struct file *filp,
struct drm_device * dev)
{
- int minor = iminor(inode);
+ int minor_id = iminor(inode);
struct drm_file *priv;
int ret;
@@ -234,7 +232,7 @@
if (!drm_cpu_valid())
return -EINVAL;
- DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor);
+ DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
priv = drm_alloc(sizeof(*priv), DRM_MEM_FILES);
if (!priv)
@@ -245,8 +243,7 @@
priv->filp = filp;
priv->uid = current->euid;
priv->pid = task_pid_nr(current);
- priv->minor = minor;
- priv->head = drm_heads[minor];
+ priv->minor = idr_find(&drm_minors_idr, minor_id);
priv->ioctl_count = 0;
/* for compatibility root is always authenticated */
priv->authenticated = capable(CAP_SYS_ADMIN);
@@ -297,11 +294,11 @@
int drm_fasync(int fd, struct file *filp, int on)
{
struct drm_file *priv = filp->private_data;
- struct drm_device *dev = priv->head->dev;
+ struct drm_device *dev = priv->minor->dev;
int retcode;
DRM_DEBUG("fd = %d, device = 0x%lx\n", fd,
- (long)old_encode_dev(priv->head->device));
+ (long)old_encode_dev(priv->minor->device));
retcode = fasync_helper(fd, filp, on, &dev->buf_async);
if (retcode < 0)
return retcode;
@@ -324,7 +321,7 @@
int drm_release(struct inode *inode, struct file *filp)
{
struct drm_file *file_priv = filp->private_data;
- struct drm_device *dev = file_priv->head->dev;
+ struct drm_device *dev = file_priv->minor->dev;
int retcode = 0;
unsigned long irqflags;
@@ -341,7 +338,7 @@
DRM_DEBUG("pid = %d, device = 0x%lx, open_count = %d\n",
task_pid_nr(current),
- (long)old_encode_dev(file_priv->head->device),
+ (long)old_encode_dev(file_priv->minor->device),
dev->open_count);
if (dev->driver->reclaim_buffers_locked && dev->lock.hw_lock) {