Input: synaptics-rmi4 - do not delete interrupt memory too early

commit a1ab690 upstream.

We want to free memory reserved for interrupt mask handling only after we
free functions, as function drivers might want to mask interrupts. This is
needed for the followup patch to the F03 that would implement unmasking and
masking interrupts from the serio pass-through port open() and close()
methods.

Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/input/rmi4/rmi_driver.c

@@ -41,6 +41,13 @@ void rmi_free_function_list(struct rmi_device *rmi_dev)
 
 	rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Freeing function list\n");
 
+	/* Doing it in the reverse order so F01 will be removed last */
+	list_for_each_entry_safe_reverse(fn, tmp,
+					 &data->function_list, node) {
+		list_del(&fn->node);
+		rmi_unregister_function(fn);
+	}
+
 	devm_kfree(&rmi_dev->dev, data->irq_memory);
 	data->irq_memory = NULL;
 	data->irq_status = NULL;
@@ -50,13 +57,6 @@ void rmi_free_function_list(struct rmi_device *rmi_dev)
 
 	data->f01_container = NULL;
 	data->f34_container = NULL;
-
-	/* Doing it in the reverse order so F01 will be removed last */
-	list_for_each_entry_safe_reverse(fn, tmp,
-					 &data->function_list, node) {
-		list_del(&fn->node);
-		rmi_unregister_function(fn);
-	}
 }
 
 static int reset_one_function(struct rmi_function *fn)