diff options
Diffstat (limited to 'packages/linux/nslu2-kernel/2.6.13/10-ixp4xx-copy-from.patch')
| -rw-r--r-- | packages/linux/nslu2-kernel/2.6.13/10-ixp4xx-copy-from.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/packages/linux/nslu2-kernel/2.6.13/10-ixp4xx-copy-from.patch b/packages/linux/nslu2-kernel/2.6.13/10-ixp4xx-copy-from.patch new file mode 100644 index 0000000000..03d94d282c --- /dev/null +++ b/packages/linux/nslu2-kernel/2.6.13/10-ixp4xx-copy-from.patch @@ -0,0 +1,39 @@ +# This patch fixes ixp4xx_copy_from for cases where the 'from' +# pointer is odd - that would cause all the accesses to be +# misaligned in the old code. +--- linux-2.6.12.2/.pc/ixp4xx_copy_from.patch/drivers/mtd/maps/ixp4xx.c 2005-09-21 22:35:38.761014739 -0700 ++++ linux-2.6.12.2/drivers/mtd/maps/ixp4xx.c 2005-09-23 01:27:54.696223365 -0700 +@@ -54,19 +54,23 @@ + static void ixp4xx_copy_from(struct map_info *map, void *to, + unsigned long from, ssize_t len) + { +- int i; +- u8 *dest = (u8 *) to; +- u16 *src = (u16 *) (map->map_priv_1 + from); +- u16 data; ++ if (len <= 0) ++ return; + +- for (i = 0; i < (len / 2); i++) { +- data = src[i]; +- dest[i * 2] = BYTE0(data); +- dest[i * 2 + 1] = BYTE1(data); ++ u8 *dest = (u8 *) to; ++ u8 *src = (u8 *) (map->map_priv_1 + from); ++ if (from & 1) ++ *dest++ = BYTE1(*(u16 *)(src-1)), ++src, --len; ++ ++ while (len >= 2) { ++ u16 data = *(u16 *)src; src += 2; ++ *dest++ = BYTE0(data); ++ *dest++ = BYTE1(data); ++ len -= 2; + } + +- if (len & 1) +- dest[len - 1] = BYTE0(src[i]); ++ if (len > 0) ++ *dest++ = BYTE0(*(u16 *)src); + } + + /* |