1 files changed, 36 insertions, 22 deletions

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 5b3c7d135dc9..e10ba3755dfa 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -70,27 +70,12 @@ static struct vgasr_priv vgasr_priv = {
         .clients = LIST_HEAD_INIT(vgasr_priv.clients),
 };
 
-int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler)
-{
-        mutex_lock(&vgasr_mutex);
-        if (vgasr_priv.handler) {
-                mutex_unlock(&vgasr_mutex);
-                return -EINVAL;
-        }
-
-        vgasr_priv.handler = handler;
-        mutex_unlock(&vgasr_mutex);
-        return 0;
-}
-EXPORT_SYMBOL(vga_switcheroo_register_handler);
-
-void vga_switcheroo_unregister_handler(void)
+static bool vga_switcheroo_ready(void)
 {
-        mutex_lock(&vgasr_mutex);
-        vgasr_priv.handler = NULL;
-        mutex_unlock(&vgasr_mutex);
+        /* we're ready if we get two clients + handler */
+        return !vgasr_priv.active &&
+               vgasr_priv.registered_clients == 2 && vgasr_priv.handler;
 }
-EXPORT_SYMBOL(vga_switcheroo_unregister_handler);
 
 static void vga_switcheroo_enable(void)
 {
@@ -113,6 +98,37 @@ static void vga_switcheroo_enable(void)
         vgasr_priv.active = true;
 }
 
+int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler)
+{
+        mutex_lock(&vgasr_mutex);
+        if (vgasr_priv.handler) {
+                mutex_unlock(&vgasr_mutex);
+                return -EINVAL;
+        }
+
+        vgasr_priv.handler = handler;
+        if (vga_switcheroo_ready()) {
+                printk(KERN_INFO "vga_switcheroo: enabled\n");
+                vga_switcheroo_enable();
+        }
+        mutex_unlock(&vgasr_mutex);
+        return 0;
+}
+EXPORT_SYMBOL(vga_switcheroo_register_handler);
+
+void vga_switcheroo_unregister_handler(void)
+{
+        mutex_lock(&vgasr_mutex);
+        vgasr_priv.handler = NULL;
+        if (vgasr_priv.active) {
+                pr_info("vga_switcheroo: disabled\n");
+                vga_switcheroo_debugfs_fini(&vgasr_priv);
+                vgasr_priv.active = false;
+        }
+        mutex_unlock(&vgasr_mutex);
+}
+EXPORT_SYMBOL(vga_switcheroo_unregister_handler);
+
 static int register_client(struct pci_dev *pdev,
                            const struct vga_switcheroo_client_ops *ops,
                            int id, bool active)
@@ -134,9 +150,7 @@ static int register_client(struct pci_dev *pdev,
         if (client_is_vga(client))
                 vgasr_priv.registered_clients++;
 
-        /* if we get two clients + handler */
-        if (!vgasr_priv.active &&
-            vgasr_priv.registered_clients == 2 && vgasr_priv.handler) {
+        if (vga_switcheroo_ready()) {
                 printk(KERN_INFO "vga_switcheroo: enabled\n");
                 vga_switcheroo_enable();
         }