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| author | Emil Velikov <emil.velikov@collabora.com> | 2018-10-23 18:35:49 +0200 |
|---|---|---|
| committer | Emil Velikov <emil.l.velikov@gmail.com> | 2018-10-25 14:25:58 +0200 |
| commit | f08877e79485897aa1093514daa668cc5b728418 (patch) | |
| tree | fe2a02248e6000ef264d34bc6a9e38412cf97a94 /drivers/gpu/drm/drm_drv.c | |
| parent | drm/vgem: Fix vgem_init to get drm device available. (diff) | |
| download | linux-f08877e79485897aa1093514daa668cc5b728418.tar.xz linux-f08877e79485897aa1093514daa668cc5b728418.zip | |
drm: BUG_ON if passing NULL parent to drm_dev_init
Previous commit removed the only reason why we were allowing NULL as
a parent device. With that resolved, we can enforce nobody else does
that mistake.
With that we can drop the ugly drm_dev_set_unique workaround.
v2: rebase, silence checkpatch "== NULL" warning
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Deepak Sharma <deepak.sharma@amd.com>
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181023163550.15211-2-emil.l.velikov@gmail.com
Diffstat (limited to 'drivers/gpu/drm/drm_drv.c')
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 36e8e9cbec52..aa1cef794f9a 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -476,8 +476,6 @@ static void drm_fs_inode_free(struct inode *inode) * The initial ref-count of the object is 1. Use drm_dev_get() and * drm_dev_put() to take and drop further ref-counts. * - * Note that for purely virtual devices @parent can be NULL. - * * Drivers that do not want to allocate their own device struct * embedding &struct drm_device can call drm_dev_alloc() instead. For drivers * that do embed &struct drm_device it must be placed first in the overall @@ -502,6 +500,8 @@ int drm_dev_init(struct drm_device *dev, return -ENODEV; } + BUG_ON(!parent); + kref_init(&dev->ref); dev->dev = parent; dev->driver = driver; @@ -556,9 +556,7 @@ int drm_dev_init(struct drm_device *dev, } } - /* Use the parent device name as DRM device unique identifier, but fall - * back to the driver name for virtual devices like vgem. */ - ret = drm_dev_set_unique(dev, parent ? dev_name(parent) : driver->name); + ret = drm_dev_set_unique(dev, dev_name(parent)); if (ret) goto err_setunique; |