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| author | Rafał Miłecki <zajec5@gmail.com> | 2015-04-01 08:23:05 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-02 13:54:20 +0200 |
| commit | 40d12172c8a5c2f3fc39642fc564b053575cd000 (patch) | |
| tree | 0f9dfe065a31b8e788118f1733dbfb0ad10d7ea9 /arch/mips/bcm47xx | |
| parent | 6ab7c29099390b3d23c97f14498fd26a5ef6b22b (diff) | |
| download | linux-40d12172c8a5c2f3fc39642fc564b053575cd000.tar.gz linux-40d12172c8a5c2f3fc39642fc564b053575cd000.tar.bz2 linux-40d12172c8a5c2f3fc39642fc564b053575cd000.zip | |
MIPS: BCM47XX: Don't try guessing NVRAM size on MTD partition
When dealing with whole flash content (bcm47xx_nvram_init_from_mem) we
need to find NVRAM start trying various partition sizes (nvram_sizes).
This is not needed when using MTD as we have direct partition access.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Patchwork: https://patchwork.linux-mips.org/patch/9652/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/bcm47xx')
| -rw-r--r-- | arch/mips/bcm47xx/nvram.c | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/arch/mips/bcm47xx/nvram.c b/arch/mips/bcm47xx/nvram.c index 2ac74825397c..ba632ff08a13 100644 --- a/arch/mips/bcm47xx/nvram.c +++ b/arch/mips/bcm47xx/nvram.c @@ -139,36 +139,28 @@ static int nvram_init(void) struct mtd_info *mtd; struct nvram_header header; size_t bytes_read; - int err, i; + int err; mtd = get_mtd_device_nm("nvram"); if (IS_ERR(mtd)) return -ENODEV; - for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) { - loff_t from = mtd->size - nvram_sizes[i]; - - if (from < 0) - continue; - - err = mtd_read(mtd, from, sizeof(header), &bytes_read, - (uint8_t *)&header); - if (!err && header.magic == NVRAM_MAGIC) { - u8 *dst = (uint8_t *)nvram_buf; - size_t len = header.len; + err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header); + if (!err && header.magic == NVRAM_MAGIC) { + u8 *dst = (uint8_t *)nvram_buf; + size_t len = header.len; - if (header.len > NVRAM_SPACE) { - pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", - header.len, NVRAM_SPACE); - len = NVRAM_SPACE; - } + if (header.len > NVRAM_SPACE) { + pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n", + header.len, NVRAM_SPACE); + len = NVRAM_SPACE; + } - err = mtd_read(mtd, from, len, &bytes_read, dst); - if (err) - return err; + err = mtd_read(mtd, 0, len, &bytes_read, dst); + if (err) + return err; - return 0; - } + return 0; } #endif |