diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 791c4dc..94f5e8e 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -90,7 +90,7 @@
 	int			value;
 	struct spi_driver	*drv = to_spi_driver(dev->driver);
 
-	if (!drv->suspend)
+	if (!drv || !drv->suspend)
 		return 0;
 
 	/* suspend will stop irqs and dma; no more i/o */
@@ -105,7 +105,7 @@
 	int			value;
 	struct spi_driver	*drv = to_spi_driver(dev->driver);
 
-	if (!drv->resume)
+	if (!drv || !drv->resume)
 		return 0;
 
 	/* resume may restart the i/o queue */
@@ -449,7 +449,6 @@
 {
 	(void) device_for_each_child(master->cdev.dev, NULL, __unregister);
 	class_device_unregister(&master->cdev);
-	master->cdev.dev = NULL;
 }
 EXPORT_SYMBOL_GPL(spi_unregister_master);