block/swim: Don't log an error message for an invalid ioctl

commit 8e2ab5a4efaac77fb93e5b5b109d0b3976fdd3a0 upstream.

The 'eject' shell command may send various different ioctl commands.
This leads to error messages on the console even though the FDEJECT
ioctl succeeds.

~# eject floppy
SWIM floppy_ioctl: unknown cmd 21257
SWIM floppy_ioctl: unknown cmd 1

Don't log an error message for an invalid ioctl, just do as the
swim3 driver does and return -ENOTTY.

Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: stable@vger.kernel.org # v4.14+
Tested-by: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/block/swim.c b/drivers/block/swim.c
index eb8b7573586d0c2828e3c32017017df67f9205f8..095f22acd70977b0e2acc054296ce055d7ca3105 100644 (file)
--- a/drivers/block/swim.c
+++ b/drivers/block/swim.c
@@ -727,14 +727,9 @@ static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
                if (copy_to_user((void __user *) param, (void *) &floppy_type,
                                 sizeof(struct floppy_struct)))
                        return -EFAULT;
-               break;
-
-       default:
-               printk(KERN_DEBUG "SWIM floppy_ioctl: unknown cmd %d\n",
-                      cmd);
-               return -ENOSYS;
+               return 0;
        }
-       return 0;
+       return -ENOTTY;
 }
 
 static int floppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)