brcm47xx: add some more partition parser fixes by Rafał Miłecki

[openwrt/openwrt.git] / target / linux / brcm47xx / patches-3.8 / 027-mtd-bcm47xxpart-get-nvram.patch

diff --git a/target/linux/brcm47xx/patches-3.8/027-mtd-bcm47xxpart-get-nvram.patch b/target/linux/brcm47xx/patches-3.8/027-mtd-bcm47xxpart-get-nvram.patch
new file mode 100644 (file)
index 0000000..4cd78c2
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.8/027-mtd-bcm47xxpart-get-nvram.patch
@@ -0,0 +1,34 @@
+--- a/drivers/mtd/bcm47xxpart.c
++++ b/drivers/mtd/bcm47xxpart.c
+@@ -65,6 +65,7 @@ static int bcm47xxpart_parse(struct mtd_
+       int trx_part = -1;
+       int last_trx_part = -1;
+       int possible_nvram_sizes[] = { 0x8000, 0xF000, 0x10000, };
++      bool found_nvram = false;
+ 
+       if (blocksize <= 0x10000)
+               blocksize = 0x10000;
+@@ -190,12 +191,23 @@ 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.