76d079204d
Changelogs: * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.12 * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.13 * https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.14 Build tested on brcm63xx and ipq806x, runtested on brcm63xx. Signed-off-by: Jonas Gorski <jogo@openwrt.org> SVN-Revision: 45711
76 lines
2.3 KiB
Diff
76 lines
2.3 KiB
Diff
From 40d12172c8a5c2f3fc39642fc564b053575cd000 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com>
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Date: Wed, 1 Apr 2015 08:23:05 +0200
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Subject: [PATCH] MIPS: BCM47XX: Don't try guessing NVRAM size on MTD partition
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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When dealing with whole flash content (bcm47xx_nvram_init_from_mem) we
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need to find NVRAM start trying various partition sizes (nvram_sizes).
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This is not needed when using MTD as we have direct partition access.
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
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Cc: linux-mips@linux-mips.org
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Cc: Hauke Mehrtens <hauke@hauke-m.de>
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Patchwork: https://patchwork.linux-mips.org/patch/9652/
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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---
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arch/mips/bcm47xx/nvram.c | 36 ++++++++++++++----------------------
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1 file changed, 14 insertions(+), 22 deletions(-)
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--- a/arch/mips/bcm47xx/nvram.c
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+++ b/arch/mips/bcm47xx/nvram.c
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@@ -139,36 +139,28 @@ static int nvram_init(void)
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struct mtd_info *mtd;
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struct nvram_header header;
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size_t bytes_read;
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- int err, i;
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+ int err;
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mtd = get_mtd_device_nm("nvram");
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if (IS_ERR(mtd))
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return -ENODEV;
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- for (i = 0; i < ARRAY_SIZE(nvram_sizes); i++) {
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- loff_t from = mtd->size - nvram_sizes[i];
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-
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- if (from < 0)
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- continue;
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+ err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
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+ if (!err && header.magic == NVRAM_MAGIC) {
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+ u8 *dst = (uint8_t *)nvram_buf;
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+ size_t len = header.len;
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+
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+ if (header.len > NVRAM_SPACE) {
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+ pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
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+ header.len, NVRAM_SPACE);
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+ len = NVRAM_SPACE;
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+ }
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- err = mtd_read(mtd, from, sizeof(header), &bytes_read,
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- (uint8_t *)&header);
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- if (!err && header.magic == NVRAM_MAGIC) {
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- u8 *dst = (uint8_t *)nvram_buf;
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- size_t len = header.len;
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-
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- if (header.len > NVRAM_SPACE) {
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- pr_err("nvram on flash (%i bytes) is bigger than the reserved space in memory, will just copy the first %i bytes\n",
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- header.len, NVRAM_SPACE);
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- len = NVRAM_SPACE;
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- }
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-
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- err = mtd_read(mtd, from, len, &bytes_read, dst);
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- if (err)
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- return err;
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+ err = mtd_read(mtd, 0, len, &bytes_read, dst);
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+ if (err)
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+ return err;
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- return 0;
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- }
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+ return 0;
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}
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#endif
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