diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fops.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 25 |
1 files changed, 3 insertions, 22 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 8f46fe273ba3..9b02f126fb0d 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -83,8 +83,6 @@ int drm_open(struct inode *inode, struct file *filp) struct drm_minor *minor; int retcode; int need_setup = 0; - struct address_space *old_mapping; - struct address_space *old_imapping; minor = drm_minor_acquire(iminor(inode)); if (IS_ERR(minor)) @@ -93,16 +91,9 @@ int drm_open(struct inode *inode, struct file *filp) dev = minor->dev; if (!dev->open_count++) need_setup = 1; - mutex_lock(&dev->struct_mutex); - old_imapping = inode->i_mapping; - old_mapping = dev->dev_mapping; - if (old_mapping == NULL) - dev->dev_mapping = &inode->i_data; - /* ihold ensures nobody can remove inode with our i_data */ - ihold(container_of(dev->dev_mapping, struct inode, i_data)); - inode->i_mapping = dev->dev_mapping; - filp->f_mapping = dev->dev_mapping; - mutex_unlock(&dev->struct_mutex); + + /* share address_space across all char-devs of a single device */ + filp->f_mapping = dev->anon_inode->i_mapping; retcode = drm_open_helper(inode, filp, minor); if (retcode) @@ -115,12 +106,6 @@ int drm_open(struct inode *inode, struct file *filp) return 0; err_undo: - mutex_lock(&dev->struct_mutex); - filp->f_mapping = old_imapping; - inode->i_mapping = old_imapping; - iput(container_of(dev->dev_mapping, struct inode, i_data)); - dev->dev_mapping = old_mapping; - mutex_unlock(&dev->struct_mutex); dev->open_count--; drm_minor_release(minor); return retcode; @@ -421,7 +406,6 @@ int drm_lastclose(struct drm_device * dev) drm_legacy_dma_takedown(dev); - dev->dev_mapping = NULL; mutex_unlock(&dev->struct_mutex); drm_legacy_dev_reinit(dev); @@ -537,9 +521,6 @@ int drm_release(struct inode *inode, struct file *filp) } } - BUG_ON(dev->dev_mapping == NULL); - iput(container_of(dev->dev_mapping, struct inode, i_data)); - /* drop the reference held my the file priv */ if (file_priv->master) drm_master_put(&file_priv->master); |