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drm/ttm: make sure dev_mapping is set-up for the first opener of the drm

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This was causing an oops in my miniglx code to try and use a TTM-only setup.
This commit is contained in:
Dave Airlie 2007-03-27 17:59:30 +10:00
parent 674cefd4fe
commit 72a1190f6d
1 changed files with 4 additions and 1 deletions
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5
linux-core/drm_fops.c
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@ -154,10 +154,13 @@ int drm_open(struct inode *inode, struct file *filp)
spin_lock(&dev->count_lock);
if (!dev->open_count++) {
spin_unlock(&dev->count_lock);
return drm_setup(dev);
retcode = drm_setup(dev);
goto out;
}
spin_unlock(&dev->count_lock);
}
out:
mutex_lock(&dev->struct_mutex);
BUG_ON((dev->dev_mapping != NULL) &&
(dev->dev_mapping != inode->i_mapping));