target/linux/mediatek/patches-5.15/120-02-v5.18-mtd-nand-Add-a-new-helper-to-retrieve-the-ECC-contex.patch

   1 From 840b2f8dd2d0579e517140e1f9bbc482eaf4ed07 Mon Sep 17 00:00:00 2001
   2 From: Miquel Raynal <miquel.raynal@bootlin.com>
   3 Date: Thu, 16 Dec 2021 12:16:39 +0100
   4 Subject: [PATCH 02/15] mtd: nand: Add a new helper to retrieve the ECC context
   5
   6 Introduce nand_to_ecc_ctx() which will allow to easily jump to the
   7 private pointer of an ECC context given a NAND device. This is very
   8 handy, from the prepare or finish ECC hook, to get the internal context
   9 out of the NAND device object.
  10
  11 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  12 Link: https://lore.kernel.org/linux-mtd/20211216111654.238086-14-miquel.raynal@bootlin.com
  13 (cherry picked from commit cda32a618debd3fad8e42757b198719ae180f8f4)
  14 ---
  15  include/linux/mtd/nand.h | 5 +++++
  16  1 file changed, 5 insertions(+)
  17
  18 --- a/include/linux/mtd/nand.h
  19 +++ b/include/linux/mtd/nand.h
  20 @@ -990,6 +990,11 @@ int nanddev_markbad(struct nand_device *
  21  int nanddev_ecc_engine_init(struct nand_device *nand);
  22  void nanddev_ecc_engine_cleanup(struct nand_device *nand);
  23
  24 +static inline void *nand_to_ecc_ctx(struct nand_device *nand)
  25 +{
  26 +       return nand->ecc.ctx.priv;
  27 +}
  28 +
  29  /* BBT related functions */
  30  enum nand_bbt_block_status {
  31         NAND_BBT_BLOCK_STATUS_UNKNOWN,