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authorRafał Miłecki <zajec5@gmail.com>2015-04-01 08:23:05 +0200
committerRalf Baechle <ralf@linux-mips.org>2015-04-02 13:54:20 +0200
commit40d12172c8a5c2f3fc39642fc564b053575cd000 (patch)
tree0f9dfe065a31b8e788118f1733dbfb0ad10d7ea9 /arch/mips/bcm47xx
parent6ab7c29099390b3d23c97f14498fd26a5ef6b22b (diff)
downloadlinux-40d12172c8a5c2f3fc39642fc564b053575cd000.tar.bz2
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.c36
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