target/linux/generic/backport-5.15/809-v6.3-0004-nvmem-core-drop-the-removal-of-the-cells-in-nvmem_ad.patch

   1 From cc5bdd323dde6494623f3ffe3a5b887fa21cd375 Mon Sep 17 00:00:00 2001
   2 From: Michael Walle <michael@walle.cc>
   3 Date: Mon, 6 Feb 2023 13:43:48 +0000
   4 Subject: [PATCH] nvmem: core: drop the removal of the cells in
   5  nvmem_add_cells()
   6
   7 If nvmem_add_cells() fails, the whole nvmem_register() will fail
   8 and the cells will then be removed anyway. This is a preparation
   9 to introduce a nvmem_add_one_cell() which can then be used by
  10 nvmem_add_cells().
  11
  12 This is then the same to what nvmem_add_cells_from_table() and
  13 nvmem_add_cells_from_of() do.
  14
  15 Signed-off-by: Michael Walle <michael@walle.cc>
  16 Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
  17 Link: https://lore.kernel.org/r/20230206134356.839737-15-srinivas.kandagatla@linaro.org
  18 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  19 ---
  20  drivers/nvmem/core.c | 14 ++++----------
  21  1 file changed, 4 insertions(+), 10 deletions(-)
  22
  23 --- a/drivers/nvmem/core.c
  24 +++ b/drivers/nvmem/core.c
  25 @@ -515,7 +515,7 @@ static int nvmem_add_cells(struct nvmem_
  26                     int ncells)
  27  {
  28         struct nvmem_cell_entry **cells;
  29 -       int i, rval;
  30 +       int i, rval = 0;
  31
  32         cells = kcalloc(ncells, sizeof(*cells), GFP_KERNEL);
  33         if (!cells)
  34 @@ -525,28 +525,22 @@ static int nvmem_add_cells(struct nvmem_
  35                 cells[i] = kzalloc(sizeof(**cells), GFP_KERNEL);
  36                 if (!cells[i]) {
  37                         rval = -ENOMEM;
  38 -                       goto err;
  39 +                       goto out;
  40                 }
  41
  42                 rval = nvmem_cell_info_to_nvmem_cell_entry(nvmem, &info[i], cells[i]);
  43                 if (rval) {
  44                         kfree(cells[i]);
  45 -                       goto err;
  46 +                       goto out;
  47                 }
  48
  49                 nvmem_cell_entry_add(cells[i]);
  50         }
  51
  52 +out:
  53         /* remove tmp array */
  54         kfree(cells);
  55
  56 -       return 0;
  57 -err:
  58 -       while (i--)
  59 -               nvmem_cell_entry_drop(cells[i]);
  60 -
  61 -       kfree(cells);
  62 -
  63         return rval;
  64  }
  65