md: Add dm-req-crypt driver snapshot
This is a snapshot of dm-req-crypt driver as of msm-4.4
commit <0293b8a7d07a2> (qcom: smb-lib: rerun APSD on
insertion for micro USB mode).
Change-Id: Ifa51a02d5ba0bd4a7b623f6dc8c18f1c921ae127
Signed-off-by: AnilKumar Chimata <anilc@codeaurora.org>
diff --git a/block/blk-core.c b/block/blk-core.c
index 710c93b..d8fba67 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1438,6 +1438,9 @@
/* this is a bio leak */
WARN_ON(req->bio != NULL);
+ /* this is a bio leak if the bio is not tagged with BIO_DONTFREE */
+ WARN_ON(req->bio && !bio_flagged(req->bio, BIO_DONTFREE));
+
/*
* Request may not have originated from ll_rw_blk. if not,
* it didn't come out of our reserved rq pools
@@ -2619,6 +2622,15 @@
blk_account_io_completion(req, nr_bytes);
total_bytes = 0;
+
+ /*
+ * Check for this if flagged, Req based dm needs to perform
+ * post processing, hence dont end bios or request.DM
+ * layer takes care.
+ */
+ if (bio_flagged(req->bio, BIO_DONTFREE))
+ return false;
+
while (req->bio) {
struct bio *bio = req->bio;
unsigned bio_bytes = min(bio->bi_iter.bi_size, nr_bytes);