bcache: Hack around stuff that clones up to bi_max_vecs

Signed-off-by: Kent Overstreet <koverstreet@google.com>

diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index f565512f6fac23eb87e84086199e53dcb3dfe74d..b4c0e28a7cd16d65f31184143dba49aaf22d55d2 100644 (file)
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -38,6 +38,15 @@ static void bch_generic_make_request_hack(struct bio *bio)
                bio = clone;
        }
 
+       /*
+        * Hack, since drivers that clone bios clone up to bi_max_vecs, but our
+        * bios might have had more than that (before we split them per device
+        * limitations).
+        *
+        * To be taken out once immutable bvec stuff is in.
+        */
+       bio->bi_max_vecs = bio->bi_vcnt;
+
        generic_make_request(bio);
 }