bcm53xx: update NVRAM driver to MIPS version from upstream-sfr

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45943 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/bcm53xx/files/drivers/firmware/broadcom/bcm47xx_nvram.c b/target/linux/bcm53xx/files/drivers/firmware/broadcom/bcm47xx_nvram.c
index 3f35746..87add3f 100644 (file)
--- a/target/linux/bcm53xx/files/drivers/firmware/broadcom/bcm47xx_nvram.c
+++ b/target/linux/bcm53xx/files/drivers/firmware/broadcom/bcm47xx_nvram.c
@@ -35,6 +35,7 @@ struct nvram_header {
 };
 
 static char nvram_buf[NVRAM_SPACE];
+static size_t nvram_len;
 static const u32 nvram_sizes[] = {0x8000, 0xF000, 0x10000};
 
 static u32 find_nvram_size(void __iomem *end)
@@ -60,7 +61,7 @@ static int nvram_find_and_copy(void __iomem *iobase, u32 lim)
        u32 *src, *dst;
        u32 size;
 
-       if (nvram_buf[0]) {
+       if (nvram_len) {
                pr_warn("nvram already initialized\n");
                return -EEXIST;
        }
@@ -99,17 +100,18 @@ found:
        for (i = 0; i < sizeof(struct nvram_header); i += 4)
                *dst++ = __raw_readl(src++);
        header = (struct nvram_header *)nvram_buf;
-       if (header->len > size) {
+       nvram_len = header->len;
+       if (nvram_len > size) {
                pr_err("The nvram size according to the header seems to be bigger than the partition on flash\n");
-               header->len = size;
+               nvram_len = size;
        }
-       if (header->len >= NVRAM_SPACE) {
+       if (nvram_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 - 1);
-               header->len = NVRAM_SPACE - 1;
+               nvram_len = NVRAM_SPACE - 1;
        }
        /* proceed reading data after header */
-       for (; i < header->len; i += 4)
+       for (; i < nvram_len; i += 4)
                *dst++ = readl(src++);
        nvram_buf[NVRAM_SPACE - 1] = '\0';
 
@@ -144,7 +146,6 @@ static int nvram_init(void)
 #ifdef CONFIG_MTD
        struct mtd_info *mtd;
        struct nvram_header header;
-       struct nvram_header *pheader;
        size_t bytes_read;
        int err;
 
@@ -155,20 +156,16 @@ static int nvram_init(void)
        err = mtd_read(mtd, 0, sizeof(header), &bytes_read, (uint8_t *)&header);
        if (!err && header.magic == NVRAM_MAGIC &&
            header.len > sizeof(header)) {
-               if (header.len >= NVRAM_SPACE) {
+               nvram_len = header.len;
+               if (nvram_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;
+                       nvram_len = NVRAM_SPACE - 1;
                }
 
-               err = mtd_read(mtd, 0, header.len, &bytes_read,
+               err = mtd_read(mtd, 0, nvram_len, &nvram_len,
                               (u8 *)nvram_buf);
-               if (err)
-                       return err;
-
-               pheader = (struct nvram_header *)nvram_buf;
-               pheader->len = header.len;
-               return 0;
+               return err;
        }
 #endif
 
@@ -183,7 +180,7 @@ int bcm47xx_nvram_getenv(const char *name, char *val, size_t val_len)
        if (!name)
                return -EINVAL;
 
-       if (!nvram_buf[0]) {
+       if (!nvram_len) {
                err = nvram_init();
                if (err)
                        return err;
@@ -231,16 +228,14 @@ char *bcm47xx_nvram_get_contents(size_t *nvram_size)
 {
        int err;
        char *nvram;
-       struct nvram_header *header;
 
-       if (!nvram_buf[0]) {
+       if (!nvram_len) {
                err = nvram_init();
                if (err)
                        return NULL;
        }
 
-       header = (struct nvram_header *)nvram_buf;
-       *nvram_size = header->len - sizeof(struct nvram_header);
+       *nvram_size = nvram_len - sizeof(struct nvram_header);
        nvram = vmalloc(*nvram_size);
        if (!nvram)
                return NULL;