target/linux/generic/backport-5.4/831-v5.13-0001-firmware-bcm47xx_nvram-rename-finding-function-and-i.patch

   1 From fb009cbdd0693bd633f11e99526617b3d392cfad Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Mon, 8 Mar 2021 10:03:16 +0100
   4 Subject: [PATCH] firmware: bcm47xx_nvram: rename finding function and its
   5  variables
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 1. Use "bcm47xx_" function name prefix for consistency
  11 2. It takes flash start as argument so s/iobase/flash_start/
  12 3. "off" was used for finding flash end so just call it "flash_size"
  13
  14 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  15 Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
  16 ---
  17  drivers/firmware/broadcom/bcm47xx_nvram.c | 24 ++++++++++++-----------
  18  1 file changed, 13 insertions(+), 11 deletions(-)
  19
  20 --- a/drivers/firmware/broadcom/bcm47xx_nvram.c
  21 +++ b/drivers/firmware/broadcom/bcm47xx_nvram.c
  22 @@ -48,11 +48,13 @@ static u32 find_nvram_size(void __iomem
  23         return 0;
  24  }
  25
  26 -/* Probe for NVRAM header */
  27 -static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
  28 +/**
  29 + * bcm47xx_nvram_find_and_copy - find NVRAM on flash mapping & copy it
  30 + */
  31 +static int bcm47xx_nvram_find_and_copy(void __iomem *flash_start, size_t res_size)
  32  {
  33         struct nvram_header __iomem *header;
  34 -       u32 off;
  35 +       size_t flash_size;
  36         u32 size;
  37
  38         if (nvram_len) {
  39 @@ -61,25 +63,25 @@ static int nvram_find_and_copy(void __io
  40         }
  41
  42         /* TODO: when nvram is on nand flash check for bad blocks first. */
  43 -       off = FLASH_MIN;
  44 -       while (off <= lim) {
  45 +       flash_size = FLASH_MIN;
  46 +       while (flash_size <= res_size) {
  47                 /* Windowed flash access */
  48 -               size = find_nvram_size(iobase + off);
  49 +               size = find_nvram_size(flash_start + flash_size);
  50                 if (size) {
  51 -                       header = (struct nvram_header *)(iobase + off - size);
  52 +                       header = (struct nvram_header *)(flash_start + flash_size - size);
  53                         goto found;
  54                 }
  55 -               off <<= 1;
  56 +               flash_size <<= 1;
  57         }
  58
  59         /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
  60 -       header = (struct nvram_header *)(iobase + 4096);
  61 +       header = (struct nvram_header *)(flash_start + 4096);
  62         if (header->magic == NVRAM_MAGIC) {
  63                 size = NVRAM_SPACE;
  64                 goto found;
  65         }
  66
  67 -       header = (struct nvram_header *)(iobase + 1024);
  68 +       header = (struct nvram_header *)(flash_start + 1024);
  69         if (header->magic == NVRAM_MAGIC) {
  70                 size = NVRAM_SPACE;
  71                 goto found;
  72 @@ -124,7 +126,7 @@ int bcm47xx_nvram_init_from_mem(u32 base
  73         if (!iobase)
  74                 return -ENOMEM;
  75
  76 -       err = nvram_find_and_copy(iobase, lim);
  77 +       err = bcm47xx_nvram_find_and_copy(iobase, lim);
  78
  79         iounmap(iobase);
  80