mmc_block: use proper sg iterators

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 11 insertions, 6 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index 66e5a5487c20..86dbb366415a 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -213,7 +213,8 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
         struct mmc_blk_data *md = mq->data;
         struct mmc_card *card = md->queue.card;
         struct mmc_blk_request brq;
-        int ret = 1, sg_pos, data_size;
+        int ret = 1, data_size, i;
+        struct scatterlist *sg;
 
         mmc_claim_host(card->host);
 
@@ -267,18 +268,22 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 
                 mmc_queue_bounce_pre(mq);
 
+                /*
+                 * Adjust the sg list so it is the same size as the
+                 * request.
+                 */
                 if (brq.data.blocks !=
                     (req->nr_sectors >> (md->block_bits - 9))) {
                         data_size = brq.data.blocks * brq.data.blksz;
-                        for (sg_pos = 0; sg_pos < brq.data.sg_len; sg_pos++) {
-                                data_size -= mq->sg[sg_pos].length;
+                        for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) {
+                                data_size -= sg->length;
                                 if (data_size <= 0) {
-                                        mq->sg[sg_pos].length += data_size;
-                                        sg_pos++;
+                                        sg->length += data_size;
+                                        i++;
                                         break;
                                 }
                         }
-                        brq.data.sg_len = sg_pos;
+                        brq.data.sg_len = i;
                 }
 
                 mmc_wait_for_req(card->host, &brq.mrq);