block: don't call into the driver for BLKFLSBUF

BLKFLSBUF is entirely contained in the block core, and there is no
good reason to give the driver a hook into processing it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/ioctl.c b/block/ioctl.c
index 3fbc382..c6d8863 100644 (file)
--- a/block/ioctl.c
+++ b/block/ioctl.c
@@ -369,15 +369,8 @@ static inline int is_unrecognized_ioctl(int ret)
 static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode,
                unsigned cmd, unsigned long arg)
 {
-       int ret;
-
        if (!capable(CAP_SYS_ADMIN))
                return -EACCES;
-
-       ret = __blkdev_driver_ioctl(bdev, mode, cmd, arg);
-       if (!is_unrecognized_ioctl(ret))
-               return ret;
-
        fsync_bdev(bdev);
        invalidate_bdev(bdev);
        return 0;