diff options
| -rw-r--r-- | target/linux/generic-2.6/patches/050-mtdpart-redboot-partition-truncate.patch | 61 | ||||
| -rw-r--r-- | target/linux/generic-2.6/patches/050-mtdpart_redboot_byteswap_partition_truncate.patch | 61 |
2 files changed, 61 insertions, 61 deletions
diff --git a/target/linux/generic-2.6/patches/050-mtdpart-redboot-partition-truncate.patch b/target/linux/generic-2.6/patches/050-mtdpart-redboot-partition-truncate.patch new file mode 100644 index 0000000000..2e2cde0f43 --- /dev/null +++ b/target/linux/generic-2.6/patches/050-mtdpart-redboot-partition-truncate.patch @@ -0,0 +1,61 @@ +Redboot supports storing the FIS directory and the RedBoot +configuration information in the same block of flash memory. This is +not the most common RedBoot configuration, but it is used on +commercially available boards supported by the kernel. + +A recent patch to mtd/redboot.c (http://lkml.org/lkml/2006/3/20/410) +which corrected the skipping of deleted table entries has exposed the +latent problem of the kernel redboot parser running off the end of the +FIS directory and interpreting the RedBoot configuration information +as table entries. + +This patch terminates the table parsing when the first truly empty +entry is found (table entry deletion only clears the first byte of the +name, so two cleared bytes in a row indicates the end of the table), +thereby supporting the combined redboot FIS directory and RedBoot +configuration information flash layout scenario. + +Signed-off-by: Rod Whitby <rod@whitby.id.au> +-- + +Index: linux-2.6.19/drivers/mtd/redboot.c +=================================================================== +--- linux-2.6.19.orig/drivers/mtd/redboot.c ++++ linux-2.6.19/drivers/mtd/redboot.c +@@ -96,7 +96,19 @@ static int parse_redboot_partitions(stru + */ + if (swab32(buf[i].size) == master->erasesize) { + int j; +- for (j = 0; j < numslots && buf[j].name[0] != 0xff; ++j) { ++ for (j = 0; j < numslots; ++j) { ++ ++ /* A single 0xff denotes a deleted entry. ++ * Two of them in a row is the end of the table. ++ */ ++ if (buf[j].name[0] == 0xff) { ++ if (buf[j].name[1] == 0xff) { ++ break; ++ } else { ++ continue; ++ } ++ } ++ + /* The unsigned long fields were written with the + * wrong byte sex, name and pad have no byte sex. + */ +@@ -123,8 +135,13 @@ static int parse_redboot_partitions(stru + for (i = 0; i < numslots; i++) { + struct fis_list *new_fl, **prev; + +- if (buf[i].name[0] == 0xff) +- continue; ++ if (buf[i].name[0] == 0xff) { ++ if (buf[i].name[1] == 0xff) { ++ break; ++ } else { ++ continue; ++ } ++ } + if (!redboot_checksum(&buf[i])) + break; + diff --git a/target/linux/generic-2.6/patches/050-mtdpart_redboot_byteswap_partition_truncate.patch b/target/linux/generic-2.6/patches/050-mtdpart_redboot_byteswap_partition_truncate.patch deleted file mode 100644 index 2d05792405..0000000000 --- a/target/linux/generic-2.6/patches/050-mtdpart_redboot_byteswap_partition_truncate.patch +++ /dev/null @@ -1,61 +0,0 @@ -diff -urN linux-2.6.19.old/drivers/mtd/redboot.c linux-2.6.19.dev/drivers/mtd/redboot.c ---- linux-2.6.19.old/drivers/mtd/redboot.c 2006-11-29 22:57:37.000000000 +0100 -+++ linux-2.6.19.dev/drivers/mtd/redboot.c 2006-12-14 03:13:35.000000000 +0100 -@@ -92,22 +92,47 @@ - * swab32(erasesize) then we know we are looking at - * a byte swapped FIS directory - swap all the entries! - * (NOTE: this is 'size' not 'data_length'; size is -- * the full size of the entry.) -+ * the full size of the entry.) -+ * -+ * Handle cases where the FIS directory is less than -+ * a full erase block (like combine FIS directory -+ * and RedBoot config). -+ * -+ * IMHO the best solution would be to compute the -+ * flash address of the RedBoot FIS directory and -+ * compare that with the entry in the FIS directory -+ * entry swabbed. However, I haven't yet figured out -+ * how to compute that. - */ -- if (swab32(buf[i].size) == master->erasesize) { -+ -+ unsigned long erasesize_mask = master->erasesize -1; -+ unsigned long eraseaddr_mask = 0xFFFFFFFF ^ erasesize_mask; -+ -+ if (((swab32(buf[i].size)+erasesize_mask) -+ & eraseaddr_mask) == master->erasesize) { - int j; -- for (j = 0; j < numslots && buf[j].name[0] != 0xff; ++j) { -+ -+ /* N.B. The full table being processed so adjust size now */ -+ numslots = swab32(buf[i].size) / sizeof (struct fis_image_desc); -+ for (j = 0; j < numslots; ++j) { - /* The unsigned long fields were written with the - * wrong byte sex, name and pad have no byte sex. -+ * -+ * Only process non-deleted entries. Don't exit early. - */ -- swab32s(&buf[j].flash_base); -- swab32s(&buf[j].mem_base); -- swab32s(&buf[j].size); -- swab32s(&buf[j].entry_point); -- swab32s(&buf[j].data_length); -- swab32s(&buf[j].desc_cksum); -- swab32s(&buf[j].file_cksum); -+ if (buf[j].name[0] != 0xff) { -+ swab32s(&buf[j].flash_base); -+ swab32s(&buf[j].mem_base); -+ swab32s(&buf[j].size); -+ swab32s(&buf[j].entry_point); -+ swab32s(&buf[j].data_length); -+ swab32s(&buf[j].desc_cksum); -+ swab32s(&buf[j].file_cksum); -+ } - } -+ } else { -+ /* Update numslots based on actual FIS directory size */ -+ numslots = buf[i].size / sizeof (struct fis_image_desc); - } - break; - } |