UPSTREAM: ARM: dts: rockchip: remove broken-cd from emmc and sdio

[firefly-linux-kernel-4.4.55.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 6b982cacaea85abc3bebd7ea9631154d5c7e7f10..b966db8f35569fbf970a787e583333bb84b8ec91 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -68,6 +68,18 @@ static struct bio *blk_bio_write_same_split(struct request_queue *q,
        return bio_split(bio, q->limits.max_write_same_sectors, GFP_NOIO, bs);
 }
 
+static inline unsigned get_max_io_size(struct request_queue *q,
+                                      struct bio *bio)
+{
+       unsigned sectors = blk_max_size_offset(q, bio->bi_iter.bi_sector);
+       unsigned mask = queue_logical_block_size(q) - 1;
+
+       /* aligned to logical block size */
+       sectors &= ~(mask >> 9);
+
+       return sectors;
+}
+
 static struct bio *blk_bio_segment_split(struct request_queue *q,
                                         struct bio *bio,
                                         struct bio_set *bs,
@@ -79,6 +91,7 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
        unsigned front_seg_size = bio->bi_seg_front_size;
        bool do_split = true;
        struct bio *new = NULL;
+       const unsigned max_sectors = get_max_io_size(q, bio);
 
        bio_for_each_segment(bv, bio, iter) {
                /*
@@ -88,20 +101,19 @@ static struct bio *blk_bio_segment_split(struct request_queue *q,
                if (bvprvp && bvec_gap_to_prev(q, bvprvp, bv.bv_offset))
                        goto split;
 
-               if (sectors + (bv.bv_len >> 9) >
-                               blk_max_size_offset(q, bio->bi_iter.bi_sector)) {
+               if (sectors + (bv.bv_len >> 9) > max_sectors) {
                        /*
                         * Consider this a new segment if we're splitting in
                         * the middle of this vector.
                         */
                        if (nsegs < queue_max_segments(q) &&
-                           sectors < blk_max_size_offset(q,
-                                               bio->bi_iter.bi_sector)) {
+                           sectors < max_sectors) {
                                nsegs++;
-                               sectors = blk_max_size_offset(q,
-                                               bio->bi_iter.bi_sector);
+                               sectors = max_sectors;
                        }
-                       goto split;
+                       if (sectors)
+                               goto split;
+                       /* Make this single bvec as the 1st segment */
                }
 
                if (bvprvp && blk_queue_cluster(q)) {