USB: Move USB Storage definitions to their own header file

[pandora-kernel.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 5e7dc99..eafc94f 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -12,7 +12,6 @@
 static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
                                             struct bio *bio)
 {
-       unsigned int phys_size;
        struct bio_vec *bv, *bvprv = NULL;
        int cluster, i, high, highprv = 1;
        unsigned int seg_size, nr_phys_segs;
@@ -24,7 +23,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
        fbio = bio;
        cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
        seg_size = 0;
-       phys_size = nr_phys_segs = 0;
+       nr_phys_segs = 0;
        for_each_bio(bio) {
                bio_for_each_segment(bv, bio, i) {
                        /*
@@ -180,7 +179,7 @@ new_segment:
        }
 
        if (q->dma_drain_size && q->dma_drain_needed(rq)) {
-               if (rq->cmd_flags & REQ_RW)
+               if (rq->cmd_flags & REQ_WRITE)
                        memset(q->dma_drain_buffer, 0, q->dma_drain_size);
 
                sg->page_link &= ~0x02;
@@ -226,7 +225,7 @@ int ll_back_merge_fn(struct request_queue *q, struct request *req,
 {
        unsigned short max_sectors;
 
-       if (unlikely(blk_pc_request(req)))
+       if (unlikely(req->cmd_type == REQ_TYPE_BLOCK_PC))
                max_sectors = queue_max_hw_sectors(q);
        else
                max_sectors = queue_max_sectors(q);
@@ -250,7 +249,7 @@ int ll_front_merge_fn(struct request_queue *q, struct request *req,
 {
        unsigned short max_sectors;
 
-       if (unlikely(blk_pc_request(req)))
+       if (unlikely(req->cmd_type == REQ_TYPE_BLOCK_PC))
                max_sectors = queue_max_hw_sectors(q);
        else
                max_sectors = queue_max_sectors(q);
@@ -362,6 +361,18 @@ static int attempt_merge(struct request_queue *q, struct request *req,
        if (!rq_mergeable(req) || !rq_mergeable(next))
                return 0;
 
+       /*
+        * Don't merge file system requests and discard requests
+        */
+       if ((req->cmd_flags & REQ_DISCARD) != (next->cmd_flags & REQ_DISCARD))
+               return 0;
+
+       /*
+        * Don't merge discard requests and secure discard requests
+        */
+       if ((req->cmd_flags & REQ_SECURE) != (next->cmd_flags & REQ_SECURE))
+               return 0;
+
        /*
         * not contiguous
         */