[PATCH 1/2] drm: remove agp_init() bus callback

[David Herrmann <dh.herrmann@gmail.com>]

The PCI bus helper is the only user of it. Call it directly before
device-registration to get rid of the callback.

Note that all drm_agp_*() calls are locked with the drm-global-mutex so we
need to explicitly lock it during initialization. It's not really clear
why it's needed, but lets be safe.

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
---
Hi

If someone wants to review drm_agpsupport.c and tell me why _all_ calls to
drm_agp_*() functions currently hold the global mutex, I'd be happy to hear it.
Otherwise, I will just not care for that old stuff and keep the semantics with
the kind of ugly locks around drm_pci_agp_*().

Thanks
David

 drivers/gpu/drm/drm_pci.c  | 13 +++++++++++--
 drivers/gpu/drm/drm_stub.c | 11 +----------
 include/drm/drmP.h         |  1 -
 3 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
index f00d7a9..7d3435c 100644
--- a/drivers/gpu/drm/drm_pci.c
+++ b/drivers/gpu/drm/drm_pci.c
@@ -299,7 +299,6 @@ static struct drm_bus drm_pci_bus = {
 	.set_busid = drm_pci_set_busid,
 	.set_unique = drm_pci_set_unique,
 	.irq_by_busid = drm_pci_irq_by_busid,
-	.agp_init = drm_pci_agp_init,
 	.agp_destroy = drm_pci_agp_destroy,
 };
 
@@ -338,16 +337,26 @@ int drm_get_pci_dev(struct pci_dev *pdev, const struct pci_device_id *ent,
 	if (drm_core_check_feature(dev, DRIVER_MODESET))
 		pci_set_drvdata(pdev, dev);
 
-	ret = drm_dev_register(dev, ent->driver_data);
+	mutex_lock(&drm_global_mutex);
+	ret = drm_pci_agp_init(dev);
+	mutex_unlock(&drm_global_mutex);
 	if (ret)
 		goto err_pci;
 
+	ret = drm_dev_register(dev, ent->driver_data);
+	if (ret)
+		goto err_agp;
+
 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",
 		 driver->name, driver->major, driver->minor, driver->patchlevel,
 		 driver->date, pci_name(pdev), dev->primary->index);
 
 	return 0;
 
+err_agp:
+	mutex_lock(&drm_global_mutex);
+	drm_pci_agp_destroy(dev);
+	mutex_unlock(&drm_global_mutex);
 err_pci:
 	pci_disable_device(pdev);
 err_free:
diff --git a/drivers/gpu/drm/drm_stub.c b/drivers/gpu/drm/drm_stub.c
index 26055ab..ac211c3 100644
--- a/drivers/gpu/drm/drm_stub.c
+++ b/drivers/gpu/drm/drm_stub.c
@@ -502,16 +502,10 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags)
 
 	mutex_lock(&drm_global_mutex);
 
-	if (dev->driver->bus->agp_init) {
-		ret = dev->driver->bus->agp_init(dev);
-		if (ret)
-			goto out_unlock;
-	}
-
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
 		ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
 		if (ret)
-			goto err_agp;
+			goto out_unlock;
 	}
 
 	if (drm_core_check_feature(dev, DRIVER_RENDER) && drm_rnodes) {
@@ -554,9 +548,6 @@ err_render_node:
 err_control_node:
 	if (dev->control)
 		drm_put_minor(&dev->control);
-err_agp:
-	if (dev->driver->bus->agp_destroy)
-		dev->driver->bus->agp_destroy(dev);
 out_unlock:
 	mutex_unlock(&drm_global_mutex);
 	return ret;
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 2b954ad..dfc44ae 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -750,7 +750,6 @@ struct drm_bus {
 			  struct drm_unique *unique);
 	int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
 	/* hooks that are for PCI */
-	int (*agp_init)(struct drm_device *dev);
 	void (*agp_destroy)(struct drm_device *dev);
 
 };
-- 
1.8.4.1