Merge branch 'dmapool' of git://git.kernel.org/pub/scm/linux/kernel/git/willy/misc

[sfrench/cifs-2.6.git] / mm / bounce.c

diff --git a/mm/bounce.c b/mm/bounce.c
index ad401fc574400c50fbbf7ea80ff3e4454adfae7a..b6d2d0f1019b3975640a5b0388825b44112be7de 100644 (file)
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -140,26 +140,19 @@ static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
                mempool_free(bvec->bv_page, pool);
        }
 
-       bio_endio(bio_orig, bio_orig->bi_size, err);
+       bio_endio(bio_orig, err);
        bio_put(bio);
 }
 
-static int bounce_end_io_write(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_write(struct bio *bio, int err)
 {
-       if (bio->bi_size)
-               return 1;
-
        bounce_end_io(bio, page_pool, err);
-       return 0;
 }
 
-static int bounce_end_io_write_isa(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_write_isa(struct bio *bio, int err)
 {
-       if (bio->bi_size)
-               return 1;
 
        bounce_end_io(bio, isa_page_pool, err);
-       return 0;
 }
 
 static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
@@ -172,25 +165,17 @@ static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
        bounce_end_io(bio, pool, err);
 }
 
-static int bounce_end_io_read(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_read(struct bio *bio, int err)
 {
-       if (bio->bi_size)
-               return 1;
-
        __bounce_end_io_read(bio, page_pool, err);
-       return 0;
 }
 
-static int bounce_end_io_read_isa(struct bio *bio, unsigned int bytes_done, int err)
+static void bounce_end_io_read_isa(struct bio *bio, int err)
 {
-       if (bio->bi_size)
-               return 1;
-
        __bounce_end_io_read(bio, isa_page_pool, err);
-       return 0;
 }
 
-static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
+static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
                               mempool_t *pool)
 {
        struct page *page;
@@ -275,10 +260,16 @@ static void __blk_queue_bounce(request_queue_t *q, struct bio **bio_orig,
        *bio_orig = bio;
 }
 
-void blk_queue_bounce(request_queue_t *q, struct bio **bio_orig)
+void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
 {
        mempool_t *pool;
 
+       /*
+        * Data-less bio, nothing to bounce
+        */
+       if (bio_empty_barrier(*bio_orig))
+               return;
+
        /*
         * for non-isa bounce case, just check if the bounce pfn is equal
         * to or bigger than the highest pfn in the system -- in that case,