Master-based auth only exists for the legacy/primary drm_minor, hence
there can only be one per device. The goal here is to untangle the
epic dereference games of minor->master and master->minor which is
just massively confusing.
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_drv.c | 6 +++---
drivers/gpu/drm/drm_fops.c | 2 +-
drivers/gpu/drm/drm_internal.h | 2 +-
include/drm/drmP.h | 7 +++++--
4 files changed, 10 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 8b2582aeaab6..3c01a16bbb77 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -93,7 +93,7 @@ void drm_ut_debug_printk(const char *function_name, const char *format, ...)
}
EXPORT_SYMBOL(drm_ut_debug_printk);
-struct drm_master *drm_master_create(struct drm_minor *minor)
+struct drm_master *drm_master_create(struct drm_device *dev)
{
struct drm_master *master;
@@ -105,7 +105,7 @@ struct drm_master *drm_master_create(struct drm_minor *minor)
spin_lock_init(&master->lock.spinlock);
init_waitqueue_head(&master->lock.lock_queue);
idr_init(&master->magic_map);
- master->minor = minor;
+ master->dev = dev;
return master;
}
@@ -120,7 +120,7 @@ EXPORT_SYMBOL(drm_master_get);
static void drm_master_destroy(struct kref *kref)
{
struct drm_master *master = container_of(kref, struct drm_master, refcount);
- struct drm_device *dev = master->minor->dev;
+ struct drm_device *dev = master->dev;
if (dev->driver->master_destroy)
dev->driver->master_destroy(dev, master);
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 2fd4f42b907a..bfbf1381f55d 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -185,7 +185,7 @@ int drm_new_set_master(struct drm_device *dev, struct drm_file *fpriv)
lockdep_assert_held_once(&dev->master_mutex);
/* create a new master */
- fpriv->minor->master = drm_master_create(fpriv->minor);
+ fpriv->minor->master = drm_master_create(fpriv->minor->dev);
if (!fpriv->minor->master)
return -ENOMEM;
diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 56a9b1cf99d7..f5c1d17fa51f 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -92,7 +92,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv);
-struct drm_master *drm_master_create(struct drm_minor *minor);
+struct drm_master *drm_master_create(struct drm_device *dev);
/* drm_debugfs.c */
#if defined(CONFIG_DEBUG_FS)
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index cd3995d82477..17dcbea4f259 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -379,16 +379,19 @@ struct drm_lock_data {
* struct drm_master - drm master structure
*
* @refcount: Refcount for this master object.
- * @minor: Link back to minor char device we are master for. Immutable.
+ * @dev: Link back to the DRM device
* @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
* @unique_len: Length of unique field. Protected by drm_global_mutex.
* @magic_map: Map of used authentication tokens. Protected by struct_mutex.
* @lock: DRI lock information.
* @driver_priv: Pointer to driver-private information.
+ *
+ * Note that master structures are only relevant for the legacy/primary device
+ * nodes, hence there can only be one per device, not one per drm_minor.
*/
struct drm_master {
struct kref refcount;
- struct drm_minor *minor;
+ struct drm_device *dev;
char *unique;
int unique_len;
struct idr magic_map;
--
2.8.1
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