aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm47xx/patches-4.1/400-mtd-bcm47xxpart-get-nvram.patch
blob: de109e35f4da61850dd5a22f60ed904764a8f667 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
--- a/drivers/mtd/bcm47xxpart.c
+++ b/drivers/mtd/bcm47xxpart.c
@@ -100,6 +100,7 @@ static int bcm47xxpart_parse(struct mtd_
 	int last_trx_part = -1;
 	int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
 	int err;
+	bool found_nvram = false;
 
 	/*
 	 * Some really old flashes (like AT45DB*) had smaller erasesize-s, but
@@ -306,12 +307,23 @@ static int bcm47xxpart_parse(struct mtd_
 		if (buf[0] == NVRAM_HEADER) {
 			bcm47xxpart_add_part(&parts[curr_part++], "nvram",
 					     master->size - blocksize, 0);
+			found_nvram = true;
 			break;
 		}
 	}
 
 	kfree(buf);
 
+	if (!found_nvram) {
+		pr_err("can not find a nvram partition reserve last block\n");
+		bcm47xxpart_add_part(&parts[curr_part++], "nvram_guess",
+				     master->size - blocksize * 2, MTD_WRITEABLE);
+		for (i = 0; i < curr_part; i++) {
+			if (parts[i].size + parts[i].offset == master->size)
+				parts[i].offset -= blocksize * 2;
+		}
+	}
+
 	/*
 	 * Assume that partitions end at the beginning of the one they are
 	 * followed by.