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MIPS: BCM47XX: Make sure NVRAM buffer ends with \0 

This will simplify reading its contents.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Hante Meuleman <meuleman@broadcom.com>
Cc: Ian Kent <raven@themaw.net>
Patchwork: https://patchwork.linux-mips.org/patch/10031/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Rafał Miłecki 2015-05-12 18:46:11 +02:00 committed by Ralf Baechle
parent 2fb7ac5ba6
commit d28c9a55c2
1 changed files with 5 additions and 4 deletions
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9
arch/mips/bcm47xx/nvram.c
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@ -98,7 +98,7 @@ found:
pr_err("The nvram size accoridng to the header seems to be bigger than the partition on flash\n");
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);
header->len, NVRAM_SPACE - 1);
src = (u32 *)header;
dst = (u32 *)nvram_buf;
@ -106,6 +106,7 @@ found:
*dst++ = __raw_readl(src++);
for (; i < header->len && i < NVRAM_SPACE && i < size; i += 4)
*dst++ = readl(src++);
nvram_buf[NVRAM_SPACE - 1] = '\0';
return 0;
}
@ -150,10 +151,10 @@ static int nvram_init(void)
u8 *dst = (uint8_t *)nvram_buf;
size_t len = header.len;
if (header.len > NVRAM_SPACE) {
if (len >= NVRAM_SPACE) {
len = NVRAM_SPACE - 1;
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;
header.len, len);
}
err = mtd_read(mtd, 0, len, &bytes_read, dst);