mirror of https://github.com/hak5/openwrt.git
56 lines
1.4 KiB
Diff
56 lines
1.4 KiB
Diff
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--- a/drivers/mtd/bcm47xxpart.c
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+++ b/drivers/mtd/bcm47xxpart.c
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@@ -63,6 +63,7 @@ static int bcm47xxpart_parse(struct mtd_
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struct trx_header *trx;
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int trx_part = -1;
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int last_trx_part = -1;
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+ int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
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if (blocksize <= 0x10000)
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blocksize = 0x10000;
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@@ -99,13 +100,6 @@ static int bcm47xxpart_parse(struct mtd_
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continue;
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}
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- /* Standard NVRAM */
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- if (buf[0x000 / 4] == NVRAM_HEADER) {
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- bcm47xxpart_add_part(&parts[curr_part++], "nvram",
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- offset, 0);
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- continue;
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- }
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-
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/*
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* board_data starts with board_id which differs across boards,
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* but we can use 'MPFR' (hopefully) magic at 0x100
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@@ -174,6 +168,30 @@ static int bcm47xxpart_parse(struct mtd_
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continue;
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}
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}
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+
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+ /* Look for NVRAM at the end of the last block. */
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+ for (i = 0; i < ARRAY_SIZE(possible_nvram_sizes); i++) {
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+ if (curr_part > BCM47XXPART_MAX_PARTS) {
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+ pr_warn("Reached maximum number of partitions, scanning stopped!\n");
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+ break;
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+ }
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+
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+ offset = master->size - possible_nvram_sizes[i];
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+ if (mtd_read(master, offset, 0x4, &bytes_read,
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+ (uint8_t *)buf) < 0) {
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+ pr_err("mtd_read error while reading at offset 0x%X!\n",
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+ offset);
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+ continue;
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+ }
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+
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+ /* Standard NVRAM */
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+ if (buf[0] == NVRAM_HEADER) {
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+ bcm47xxpart_add_part(&parts[curr_part++], "nvram",
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+ master->size - blocksize, 0);
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+ break;
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+ }
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+ }
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+
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kfree(buf);
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/*
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