target/linux/generic/backport-5.10/417-v6.2-0001-mtd-core-simplify-a-bit-code-find-partition-matching.patch

   1 From 63db0cb35e1cb3b3c134906d1062f65513fdda2d Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Tue, 4 Oct 2022 10:37:09 +0200
   4 Subject: [PATCH] mtd: core: simplify (a bit) code find partition-matching
   5  dynamic OF node
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 1. Don't hardcode "partition-" string twice
  11 2. Use simpler logic & use ->name to avoid of_property_read_string()
  12 3. Use mtd_get_of_node() helper
  13
  14 Cc: Christian Marangi <ansuelsmth@gmail.com>
  15 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  16 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  17 Link: https://lore.kernel.org/linux-mtd/20221004083710.27704-1-zajec5@gmail.com
  18 ---
  19  drivers/mtd/mtdcore.c | 16 +++++++---------
  20  1 file changed, 7 insertions(+), 9 deletions(-)
  21
  22 --- a/drivers/mtd/mtdcore.c
  23 +++ b/drivers/mtd/mtdcore.c
  24 @@ -566,18 +566,16 @@ static void mtd_check_of_node(struct mtd
  25         struct device_node *partitions, *parent_dn, *mtd_dn = NULL;
  26         const char *pname, *prefix = "partition-";
  27         int plen, mtd_name_len, offset, prefix_len;
  28 -       struct mtd_info *parent;
  29         bool found = false;
  30
  31         /* Check if MTD already has a device node */
  32 -       if (dev_of_node(&mtd->dev))
  33 +       if (mtd_get_of_node(mtd))
  34                 return;
  35
  36         /* Check if a partitions node exist */
  37         if (!mtd_is_partition(mtd))
  38                 return;
  39 -       parent = mtd->parent;
  40 -       parent_dn = of_node_get(dev_of_node(&parent->dev));
  41 +       parent_dn = of_node_get(mtd_get_of_node(mtd->parent));
  42         if (!parent_dn)
  43                 return;
  44
  45 @@ -590,15 +588,15 @@ static void mtd_check_of_node(struct mtd
  46
  47         /* Search if a partition is defined with the same name */
  48         for_each_child_of_node(partitions, mtd_dn) {
  49 -               offset = 0;
  50 -
  51                 /* Skip partition with no/wrong prefix */
  52 -               if (!of_node_name_prefix(mtd_dn, "partition-"))
  53 +               if (!of_node_name_prefix(mtd_dn, prefix))
  54                         continue;
  55
  56                 /* Label have priority. Check that first */
  57 -               if (of_property_read_string(mtd_dn, "label", &pname)) {
  58 -                       of_property_read_string(mtd_dn, "name", &pname);
  59 +               if (!of_property_read_string(mtd_dn, "label", &pname)) {
  60 +                       offset = 0;
  61 +               } else {
  62 +                       pname = mtd_dn->name;
  63                         offset = prefix_len;
  64                 }
  65