block: add and use scsi_blk_cmd_ioctl

Introduce a wrapper around scsi_cmd_ioctl that takes a block device.

The function will then be enhanced to detect partition block devices
and, in that case, subject the ioctls to whitelisting.

Cc: linux-scsi@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Cc: James Bottomley <JBottomley@parallels.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/cdrom/cdrom.c b/drivers/cdrom/cdrom.c
index 1bbf7645a97c..55eaf474d32c 100644
--- a/drivers/cdrom/cdrom.c
+++ b/drivers/cdrom/cdrom.c
@@ -2746,12 +2746,11 @@ int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
 {
         void __user *argp = (void __user *)arg;
         int ret;
-        struct gendisk *disk = bdev->bd_disk;
 
         /*
          * Try the generic SCSI command ioctl's first.
          */
-        ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
+        ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
         if (ret != -ENOTTY)
                 return ret;