[Suspend2][ 07/19] [Suspend2] Cleanup modules after doing I/O on a portion of the image.

[Nigel Cunningham <nigel@suspend2.net>]

Flush any pending I/O (writes only), and cleanup modules using in doing the
I/O.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

 kernel/power/io.c |   35 +++++++++++++++++++++++++++++++++++
 1 files changed, 35 insertions(+), 0 deletions(-)

diff --git a/kernel/power/io.c b/kernel/power/io.c
index 401789d..be13f42 100644
--- a/kernel/power/io.c
+++ b/kernel/power/io.c
@@ -206,3 +206,38 @@ static int rw_init_modules(int rw, int w
 	return 0;
 }
 
+/*
+ * rw_cleanup_modules
+ *
+ * Cleanup components after reading or writing a set of pages.
+ * Only the writer may fail.
+ */
+static int rw_cleanup_modules(int rw)
+{
+	struct suspend_module_ops *this_module;
+	int result = 0;
+
+	/* Cleanup other modules */
+	list_for_each_entry(this_module, &suspend_modules, module_list) {
+		if (this_module->disabled)
+			continue;
+		if ((this_module->type == FILTER_MODULE) ||
+		    (this_module->type == WRITER_MODULE))
+			continue;
+		if (this_module->rw_cleanup)
+			result |= this_module->rw_cleanup(rw);
+	}
+
+	/* Flush data and cleanup */
+	list_for_each_entry(this_module, &suspend_filters, type_list) {
+		if (this_module->disabled)
+			continue;
+		if (this_module->rw_cleanup)
+			result |= this_module->rw_cleanup(rw);
+	}
+
+	result |= suspend_active_writer->rw_cleanup(rw);
+
+	return result;
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net