Commit acbe8f23 authored Sep 08, 2015 by Dinesh K Garg

md: Enable cache flush for dm-req-crypt based devices



dm-req-crypt based devices may be capable of cache flushing. DM
layer by default does not enable cache flushing for DM devices.
If underlying device supports flush, mapped target should also
allow it.

Change-Id: Ifbaa02411155cc49076cf3c8087851dc00a877a0
Signed-off-by: Dinesh K Garg <dineshg@codeaurora.org>

parent 8ae65e26

drivers/md/dm-req-crypt.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1265,6 +1265,12 @@ static int req_crypt_ctr(struct dm_target ti, unsigned int argc, char *argv)
		_req_dm_scatterlist_pool);
		BUG_ON(!req_scatterlist_pool);

		/*
		* If underlying device supports flush, mapped target should
		* also allow it
		*/
		ti->num_flush_bios = 1;

		err = 0;
		DMINFO("%s: Mapping block_device %s to dm-req-crypt ok!\n",
		__func__, argv[3]);