meta-agl-bsp/meta-sancloud/recipes-kernel/linux/linux-bbe/0001-Revert-block-nbd-add-sanity-check-for-first_minor.patch

   1 From 36b3d70d866d6781db4ab4c575b8bdab79244c7f Mon Sep 17 00:00:00 2001
   2 From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
   3 Date: Thu, 16 Sep 2021 10:17:11 +0200
   4 Subject: [PATCH] Revert "block: nbd: add sanity check for first_minor"
   5
   6 This reverts commit 4b21d4e820bb9a1415ec76dfe565e4c5937337dd which is
   7 commit b1a811633f7321cf1ae2bb76a66805b7720e44c9 upstream.
   8
   9 The backport of this is reported to be causing some problems, so revert
  10 this for now until they are worked out.
  11
  12 Link: https://lore.kernel.org/r/CACPK8XfUWoOHr-0RwRoYoskia4fbAbZ7DYf5wWBnv6qUnGq18w@mail.gmail.com
  13 Reported-by: Joel Stanley <joel@jms.id.au>
  14 Cc: Christoph Hellwig <hch@lst.de>
  15 Cc: Pavel Skripkin <paskripkin@gmail.com>
  16 Cc: Jens Axboe <axboe@kernel.dk>
  17 Cc: Sasha Levin <sashal@kernel.org>
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19 ---
  20  drivers/block/nbd.c | 10 ----------
  21  1 file changed, 10 deletions(-)
  22
  23 diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
  24 index 98274ba0701d..59c452fff835 100644
  25 --- a/drivers/block/nbd.c
  26 +++ b/drivers/block/nbd.c
  27 @@ -1759,17 +1759,7 @@ static int nbd_dev_add(int index)
  28         refcount_set(&nbd->refs, 1);
  29         INIT_LIST_HEAD(&nbd->list);
  30         disk->major = NBD_MAJOR;
  31 -
  32 -       /* Too big first_minor can cause duplicate creation of
  33 -        * sysfs files/links, since first_minor will be truncated to
  34 -        * byte in __device_add_disk().
  35 -        */
  36         disk->first_minor = index << part_shift;
  37 -       if (disk->first_minor > 0xff) {
  38 -               err = -EINVAL;
  39 -               goto out_free_idr;
  40 -       }
  41 -
  42         disk->fops = &nbd_fops;
  43         disk->private_data = nbd;
  44         sprintf(disk->disk_name, "nbd%d", index);
  45 --
  46 2.34.1
  47