---

yaml
---
r: 206060
b: refs/heads/master
c: 10f3f5b
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: d49d0e39a09209d0136c7da2a1a52e99af2d4656
+refs/heads/master: 10f3f5b7f6d1faca62c746d1a4e85f7afba4d7d0

trunk/drivers/staging/panel/panel.c

@@ -2124,26 +2124,42 @@ static void panel_attach(struct parport *port)
 				       NULL,
 				       /*PARPORT_DEV_EXCL */
 				       0, (void *)&pprt);
+	if (pprt == NULL) {
+		pr_err("panel_attach(): port->number=%d parport=%d, "
+		       "parport_register_device() failed\n",
+		       port->number, parport);
+		return;
+	}
 
 	if (parport_claim(pprt)) {
 		printk(KERN_ERR
 		       "Panel: could not claim access to parport%d. "
 		       "Aborting.\n", parport);
-		return;
+		goto err_unreg_device;
 	}
 
 	/* must init LCD first, just in case an IRQ from the keypad is
 	 * generated at keypad init
 	 */
 	if (lcd_enabled) {
 		lcd_init();
-		misc_register(&lcd_dev);
+		if (misc_register(&lcd_dev))
+			goto err_unreg_device;
 	}
 
 	if (keypad_enabled) {
 		keypad_init();
-		misc_register(&keypad_dev);
+		if (misc_register(&keypad_dev))
+			goto err_lcd_unreg;
 	}
+	return;
+
+err_lcd_unreg:
+	if (lcd_enabled)
+		misc_deregister(&lcd_dev);
+err_unreg_device:
+	parport_unregister_device(pprt);
+	pprt = NULL;
 }
 
 static void panel_detach(struct parport *port)