X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=block%2Fblk-core.c;h=2475b1c72773c53c0c60ebfb466929c82b2a0d2c;hb=db06d759d6cf903aeda8c107fd3abd366dd80200;hp=b60537b2c35b4152343c0239374d8ba332865b09;hpb=5d8cf7688ede7128ebdad8741ed5bdea0f2cd637;p=deliverable%2Flinux.git

diff --git a/block/blk-core.c b/block/blk-core.c
index b60537b2c35b..2475b1c72773 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1523,6 +1523,7 @@ EXPORT_SYMBOL(blk_put_request);
  * blk_add_request_payload - add a payload to a request
  * @rq: request to update
  * @page: page backing the payload
+ * @offset: offset in page
  * @len: length of the payload.
  *
  * This allows to later add a payload to an already submitted request by
@@ -1533,12 +1534,12 @@ EXPORT_SYMBOL(blk_put_request);
  * discard requests should ever use it.
  */
 void blk_add_request_payload(struct request *rq, struct page *page,
-		unsigned int len)
+		int offset, unsigned int len)
 {
 	struct bio *bio = rq->bio;
 
 	bio->bi_io_vec->bv_page = page;
-	bio->bi_io_vec->bv_offset = 0;
+	bio->bi_io_vec->bv_offset = offset;
 	bio->bi_io_vec->bv_len = len;
 
 	bio->bi_iter.bi_size = len;
@@ -1963,7 +1964,8 @@ generic_make_request_checks(struct bio *bio)
 	 * drivers without flush support don't have to worry
 	 * about them.
 	 */
-	if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) && !q->flush_flags) {
+	if ((bio->bi_rw & (REQ_FLUSH | REQ_FUA)) &&
+	    !test_bit(QUEUE_FLAG_WC, &q->queue_flags)) {
 		bio->bi_rw &= ~(REQ_FLUSH | REQ_FUA);
 		if (!nr_sectors) {
 			err = 0;