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Commit e7f7ab45 authored by Dave Airlie's avatar Dave Airlie Committed by Dave Airlie
Browse files

drm: cleanup exit path for module unload 



The current sub-module unload exit path is a mess, it tries
to abuse the idr. Just keep a list of devices per driver struct
and free them in-order on rmmod.

Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 4a6908a3

drivers/gpu/drm/drm_drv.c

+5 −20
Original line number Diff line number Diff line
@@ -263,6 +263,8 @@ int drm_init(struct drm_driver *driver) 


	DRM_DEBUG("\n");



	INIT_LIST_HEAD(&driver->device_list);



	for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {

		pid = (struct pci_device_id *)&driver->pci_driver.id_table[i];
@@ -334,30 +336,13 @@ static void drm_cleanup(struct drm_device * dev) 
		DRM_ERROR("Cannot unload module\n");

}



static int drm_minors_cleanup(int id, void *ptr, void *data)

{

	struct drm_minor *minor = ptr;

	struct drm_device *dev;

	struct drm_driver *driver = data;



	dev = minor->dev;

	if (minor->dev->driver != driver)

		return 0;



	if (minor->type != DRM_MINOR_LEGACY)

		return 0;



	if (dev)

		pci_dev_put(dev->pdev);

	drm_cleanup(dev);

	return 1;

}



void drm_exit(struct drm_driver *driver)

{

	struct drm_device *dev, *tmp;

	DRM_DEBUG("\n");



	idr_for_each(&drm_minors_idr, &drm_minors_cleanup, driver);

	list_for_each_entry_safe(dev, tmp, &driver->device_list, driver_item)

		drm_cleanup(dev);



	DRM_INFO("Module unloaded\n");

}

drivers/gpu/drm/drm_stub.c

+2 −0
Original line number Diff line number Diff line
@@ -270,6 +270,8 @@ int drm_get_dev(struct pci_dev *pdev, const struct pci_device_id *ent, 
	if ((ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY)))

		goto err_g2;



	list_add_tail(&dev->driver_item, &driver->device_list);



	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",

		 driver->name, driver->major, driver->minor, driver->patchlevel,

		 driver->date, dev->primary->index);

include/drm/drmP.h

+3 −0
Original line number Diff line number Diff line
@@ -737,6 +737,8 @@ struct drm_driver { 
	int num_ioctls;

	struct file_operations fops;

	struct pci_driver pci_driver;

	/* List of devices hanging off this driver */

	struct list_head device_list;

};



#define DRM_MINOR_UNASSIGNED 0
@@ -759,6 +761,7 @@ struct drm_minor { 
 * may contain multiple heads.

 */

struct drm_device {

	struct list_head driver_item;	/**< list of devices per driver */

	char *unique;			/**< Unique identifier: e.g., busid */

	int unique_len;			/**< Length of unique field */

	char *devname;			/**< For /proc/interrupts */