blob: 03d94d282cf3d9f2df41caf97942635069d3b2f0 (
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
35
36
37
38
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);
}
/*
|
