target/linux/generic/backport-5.15/424-v6.4-0001-mtd-core-provide-unique-name-for-nvmem-device-take-t.patch

   1 From 1cd9ceaa5282ff10ea20a7fbadde5a476a1cc99e Mon Sep 17 00:00:00 2001
   2 From: Michael Walle <michael@walle.cc>
   3 Date: Wed, 8 Mar 2023 09:20:18 +0100
   4 Subject: [PATCH] mtd: core: provide unique name for nvmem device, take two
   5
   6 Commit c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
   7 tries to give the nvmem device a unique name, but fails badly if the mtd
   8 device doesn't have a "struct device" associated with it, i.e. if
   9 CONFIG_MTD_PARTITIONED_MASTER is not set. This will result in the name
  10 "(null)-user-otp", which is not unique. It seems the best we can do is
  11 to use the compatible name together with a unique identifier added by
  12 the nvmem subsystem by using NVMEM_DEVID_AUTO.
  13
  14 Fixes: c048b60d39e1 ("mtd: core: provide unique name for nvmem device")
  15 Cc: stable@vger.kernel.org
  16 Signed-off-by: Michael Walle <michael@walle.cc>
  17 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  18 Link: https://lore.kernel.org/linux-mtd/20230308082021.870459-1-michael@walle.cc
  19 ---
  20  drivers/mtd/mtdcore.c | 5 ++---
  21  1 file changed, 2 insertions(+), 3 deletions(-)
  22
  23 --- a/drivers/mtd/mtdcore.c
  24 +++ b/drivers/mtd/mtdcore.c
  25 @@ -895,8 +895,8 @@ static struct nvmem_device *mtd_otp_nvme
  26
  27         /* OTP nvmem will be registered on the physical device */
  28         config.dev = mtd->dev.parent;
  29 -       config.name = kasprintf(GFP_KERNEL, "%s-%s", dev_name(&mtd->dev), compatible);
  30 -       config.id = NVMEM_DEVID_NONE;
  31 +       config.name = compatible;
  32 +       config.id = NVMEM_DEVID_AUTO;
  33         config.owner = THIS_MODULE;
  34         config.type = NVMEM_TYPE_OTP;
  35         config.root_only = true;
  36 @@ -912,7 +912,6 @@ static struct nvmem_device *mtd_otp_nvme
  37                 nvmem = NULL;
  38
  39         of_node_put(np);
  40 -       kfree(config.name);
  41
  42         return nvmem;
  43  }