diff options
| author | Jiri Kosina <jkosina@suse.cz> | 2010-04-23 02:08:44 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-04-23 02:08:44 +0200 |
| commit | 6c9468e9eb1252eaefd94ce7f06e1be9b0b641b1 (patch) | |
| tree | 797676a336b050bfa1ef879377c07e541b9075d6 /drivers/gpu/drm/drm_fops.c | |
| parent | 4cb3ca7cd7e2cae8d1daf5345ec99a1e8502cf3f (diff) | |
| parent | c81eddb0e3728661d1585fbc564449c94165cc36 (diff) | |
Merge branch 'master' into for-next
Diffstat (limited to 'drivers/gpu/drm/drm_fops.c')
| -rw-r--r-- | drivers/gpu/drm/drm_fops.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index 08d14df3bb4..9d532d7fdf5 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; } |