1 files changed, 28 insertions, 40 deletions

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 4a66201edae..84da748555b 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -55,6 +55,9 @@
 static int drm_version(struct drm_device *dev, void *data,
 		       struct drm_file *file_priv);
 
+#define DRM_IOCTL_DEF(ioctl, _func, _flags) \
+	[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0}
+
 /** Ioctl table */
 static struct drm_ioctl_desc drm_ioctls[] = {
 	DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, 0),
@@ -243,47 +246,20 @@ int drm_lastclose(struct drm_device * dev)
  *
  * Initializes an array of drm_device structures, and attempts to
  * initialize all available devices, using consecutive minors, registering the
- * stubs and initializing the AGP device.
+ * stubs and initializing the device.
  *
  * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
  * after the initialization for driver customization.
  */
 int drm_init(struct drm_driver *driver)
 {
-	struct pci_dev *pdev = NULL;
-	const struct pci_device_id *pid;
-	int i;
-
 	DRM_DEBUG("\n");
-
 	INIT_LIST_HEAD(&driver->device_list);
 
-	if (driver->driver_features & DRIVER_MODESET)
-		return pci_register_driver(&driver->pci_driver);
-
-	/* If not using KMS, fall back to stealth mode manual scanning. */
-	for (i = 0; driver->pci_driver.id_table[i].vendor != 0; i++) {
-		pid = &driver->pci_driver.id_table[i];
-
-		/* Loop around setting up a DRM device for each PCI device
-		 * matching our ID and device class.  If we had the internal
-		 * function that pci_get_subsys and pci_get_class used, we'd
-		 * be able to just pass pid in instead of doing a two-stage
-		 * thing.
-		 */
-		pdev = NULL;
-		while ((pdev =
-			pci_get_subsys(pid->vendor, pid->device, pid->subvendor,
-				       pid->subdevice, pdev)) != NULL) {
-			if ((pdev->class & pid->class_mask) != pid->class)
-				continue;
-
-			/* stealth mode requires a manual probe */
-			pci_dev_get(pdev);
-			drm_get_dev(pdev, pid, driver);
-		}
-	}
-	return 0;
+	if (driver->driver_features & DRIVER_USE_PLATFORM_DEVICE)
+		return drm_platform_init(driver);
+	else
+		return drm_pci_init(driver);
 }
 
 EXPORT_SYMBOL(drm_init);
@@ -315,6 +291,7 @@ static int __init drm_core_init(void)
 {
 	int ret = -ENOMEM;
 
+	drm_global_init();
 	idr_init(&drm_minors_idr);
 
 	if (register_chrdev(DRM_MAJOR, "drm", &drm_stub_fops))
@@ -362,6 +339,7 @@ static void __exit drm_core_exit(void)
 
 	unregister_chrdev(DRM_MAJOR, "drm");
 
+	idr_remove_all(&drm_minors_idr);
 	idr_destroy(&drm_minors_idr);
 }
 
@@ -446,6 +424,7 @@ long drm_ioctl(struct file *filp,
 	int retcode = -EINVAL;
 	char stack_kdata[128];
 	char *kdata = NULL;
+	unsigned int usize, asize;
 
 	dev = file_priv->minor->dev;
 	atomic_inc(&dev->ioctl_count);
@@ -461,11 +440,18 @@ long drm_ioctl(struct file *filp,
 	    ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
 		goto err_i1;
 	if ((nr >= DRM_COMMAND_BASE) && (nr < DRM_COMMAND_END) &&
-	    (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls))
+	    (nr < DRM_COMMAND_BASE + dev->driver->num_ioctls)) {
+		u32 drv_size;
 		ioctl = &dev->driver->ioctls[nr - DRM_COMMAND_BASE];
+		drv_size = _IOC_SIZE(ioctl->cmd_drv);
+		usize = asize = _IOC_SIZE(cmd);
+		if (drv_size > asize)
+			asize = drv_size;
+	}
 	else if ((nr >= DRM_COMMAND_END) || (nr < DRM_COMMAND_BASE)) {
 		ioctl = &drm_ioctls[nr];
 		cmd = ioctl->cmd;
+		usize = asize = _IOC_SIZE(cmd);
 	} else
 		goto err_i1;
 
@@ -485,10 +471,10 @@ long drm_ioctl(struct file *filp,
 		retcode = -EACCES;
 	} else {
 		if (cmd & (IOC_IN | IOC_OUT)) {
-			if (_IOC_SIZE(cmd) <= sizeof(stack_kdata)) {
+			if (asize <= sizeof(stack_kdata)) {
 				kdata = stack_kdata;
 			} else {
-				kdata = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
+				kdata = kmalloc(asize, GFP_KERNEL);
 				if (!kdata) {
 					retcode = -ENOMEM;
 					goto err_i1;
@@ -498,22 +484,24 @@ long drm_ioctl(struct file *filp,
 
 		if (cmd & IOC_IN) {
 			if (copy_from_user(kdata, (void __user *)arg,
-					   _IOC_SIZE(cmd)) != 0) {
+					   usize) != 0) {
 				retcode = -EFAULT;
 				goto err_i1;
 			}
-		}
+		} else
+			memset(kdata, 0, usize);
+
 		if (ioctl->flags & DRM_UNLOCKED)
 			retcode = func(dev, kdata, file_priv);
 		else {
-			lock_kernel();
+			mutex_lock(&drm_global_mutex);
 			retcode = func(dev, kdata, file_priv);
-			unlock_kernel();
+			mutex_unlock(&drm_global_mutex);
 		}
 
 		if (cmd & IOC_OUT) {
 			if (copy_to_user((void __user *)arg, kdata,
-					 _IOC_SIZE(cmd)) != 0)
+					 usize) != 0)
 				retcode = -EFAULT;
 		}
 	}