1 files changed, 2 insertions, 47 deletions

diff --git a/block/ioctl.c b/block/ioctl.c
index 500e4c73cc52..d3e6b5827a34 100644
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -112,22 +112,9 @@ static int blkdev_reread_part(struct block_device *bdev)
         return res;
 }
 
-static void blk_ioc_discard_endio(struct bio *bio, int err)
-{
-        if (err) {
-                if (err == -EOPNOTSUPP)
-                        set_bit(BIO_EOPNOTSUPP, &bio->bi_flags);
-                clear_bit(BIO_UPTODATE, &bio->bi_flags);
-        }
-        complete(bio->bi_private);
-}
-
 static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
                              uint64_t len)
 {
-        struct request_queue *q = bdev_get_queue(bdev);
-        int ret = 0;
-
         if (start & 511)
                 return -EINVAL;
         if (len & 511)
@@ -137,40 +124,8 @@ static int blk_ioctl_discard(struct block_device *bdev, uint64_t start,
 
         if (start + len > (bdev->bd_inode->i_size >> 9))
                 return -EINVAL;
-
-        if (!q->prepare_discard_fn)
-                return -EOPNOTSUPP;
-
-        while (len && !ret) {
-                DECLARE_COMPLETION_ONSTACK(wait);
-                struct bio *bio;
-
-                bio = bio_alloc(GFP_KERNEL, 0);
-
-                bio->bi_end_io = blk_ioc_discard_endio;
-                bio->bi_bdev = bdev;
-                bio->bi_private = &wait;
-                bio->bi_sector = start;
-
-                if (len > queue_max_hw_sectors(q)) {
-                        bio->bi_size = queue_max_hw_sectors(q) << 9;
-                        len -= queue_max_hw_sectors(q);
-                        start += queue_max_hw_sectors(q);
-                } else {
-                        bio->bi_size = len << 9;
-                        len = 0;
-                }
-                submit_bio(DISCARD_NOBARRIER, bio);
-
-                wait_for_completion(&wait);
-
-                if (bio_flagged(bio, BIO_EOPNOTSUPP))
-                        ret = -EOPNOTSUPP;
-                else if (!bio_flagged(bio, BIO_UPTODATE))
-                        ret = -EIO;
-                bio_put(bio);
-        }
-        return ret;
+        return blkdev_issue_discard(bdev, start, len, GFP_KERNEL,
+                                    DISCARD_FL_WAIT);
 }
 
 static int put_ushort(unsigned long arg, unsigned short val)