diff options
Diffstat (limited to 'drivers/gpu/drm/drm_fops.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 08d14df3bb42..e7aace20981f 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -36,6 +36,7 @@ #include "drmP.h" #include <linux/poll.h> +#include <linux/slab.h> #include <linux/smp_lock.h> static int drm_open_helper(struct inode *inode, struct file *filp, @@ -140,14 +141,16 @@ int drm_open(struct inode *inode, struct file *filp) spin_unlock(&dev->count_lock); } out: - mutex_lock(&dev->struct_mutex); - if (minor->type == DRM_MINOR_LEGACY) { - BUG_ON((dev->dev_mapping != NULL) && - (dev->dev_mapping != inode->i_mapping)); - if (dev->dev_mapping == NULL) - dev->dev_mapping = inode->i_mapping; + if (!retcode) { + mutex_lock(&dev->struct_mutex); + if (minor->type == DRM_MINOR_LEGACY) { + if (dev->dev_mapping == NULL) + dev->dev_mapping = inode->i_mapping; + else if (dev->dev_mapping != inode->i_mapping) + retcode = -ENODEV; + } + mutex_unlock(&dev->struct_mutex); } - mutex_unlock(&dev->struct_mutex); return retcode; } @@ -240,11 +243,10 @@ static int drm_open_helper(struct inode *inode, struct file *filp, DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id); - priv = kmalloc(sizeof(*priv), GFP_KERNEL); + priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - memset(priv, 0, sizeof(*priv)); filp->private_data = priv; priv->filp = filp; priv->uid = current_euid(); |