1 files changed, 12 insertions, 21 deletions

diff --git a/drivers/video/tegra/host/dev.c b/drivers/video/tegra/host/dev.c
index d21719bcda56..7917e4e20b44 100644
--- a/drivers/video/tegra/host/dev.c
+++ b/drivers/video/tegra/host/dev.c
@@ -51,9 +51,6 @@
 
 #define DRIVER_NAME		"host1x"
 
-int nvhost_major;
-int nvhost_minor;
-
 static unsigned int register_sets;
 
 struct nvhost_ctrl_userctx {
@@ -170,24 +167,21 @@ static int nvhost_ioctl_ctrl_module_mutex(struct nvhost_ctrl_userctx *ctx,
 	return err;
 }
 
-static struct nvhost_device *get_ndev_by_moduleid(struct nvhost_master *host,
-		u32 id)
+static int match_by_moduleid(struct device *dev, void *data)
 {
-	int i;
+	struct nvhost_device *ndev = to_nvhost_device(dev);
+	u32 id = (u32)data;
 
-	for (i = 0; i < host->nb_channels; i++) {
-		struct nvhost_device *ndev = host->channels[i].dev;
+	return id == ndev->moduleid;
+}
 
-		/* display and dsi do not use channel for register programming.
-		 * so their channels do not have device instance.
-		 * hence skip such channels from here. */
-		if (ndev == NULL)
-			continue;
+static struct nvhost_device *get_ndev_by_moduleid(struct nvhost_master *host,
+		u32 id)
+{
+	struct device *dev = bus_find_device(&nvhost_bus_type, NULL, (void *)id,
+			match_by_moduleid);
 
-		if (id == ndev->moduleid)
-			return ndev;
-	}
-	return NULL;
+	return dev ? to_nvhost_device(dev) : NULL;
 }
 
 static int nvhost_ioctl_ctrl_module_regrdwr(struct nvhost_ctrl_userctx *ctx,
@@ -332,9 +326,7 @@ static int __devinit nvhost_user_init(struct nvhost_master *host)
 		goto fail;
 	}
 
-	err = alloc_chrdev_region(&devno, nvhost_minor,
-				host->nb_channels + 1, IFACE_NAME);
-	nvhost_major = MAJOR(devno);
+	err = alloc_chrdev_region(&devno, 0, 1, IFACE_NAME);
 	if (err < 0) {
 		dev_err(&host->dev->dev, "failed to reserve chrdev region\n");
 		goto fail;
@@ -342,7 +334,6 @@ static int __devinit nvhost_user_init(struct nvhost_master *host)
 
 	cdev_init(&host->cdev, &nvhost_ctrlops);
 	host->cdev.owner = THIS_MODULE;
-	devno = MKDEV(nvhost_major, nvhost_minor + host->nb_channels);
 	err = cdev_add(&host->cdev, devno, 1);
 	if (err < 0)
 		goto fail;