| Message ID | 20181023163550.15211-2-emil.l.velikov@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/3] drm/vgem: Fix vgem_init to get drm device available. | expand |
Patch is Acked-by: Deepak Sharma <Deepak.sharma@amd.com> Thanks, Deepak -----Original Message----- From: Emil Velikov <emil.l.velikov@gmail.com> Sent: Tuesday, October 23, 2018 9:36 AM To: dri-devel@lists.freedesktop.org Cc: emil.l.velikov@gmail.com; Daniel Vetter <daniel.vetter@ffwll.ch>; Sharma, Deepak <Deepak.Sharma@amd.com> Subject: [PATCH 2/3] drm: BUG_ON if passing NULL parent to drm_dev_init From: Emil Velikov <emil.velikov@collabora.com> 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> --- drivers/gpu/drm/drm_drv.c | 8 +++----- 1 file 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; -- 2.19.1
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;