blob: 5e060231e5349db5f2e291b907d755be6813da1f (
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
|
From 048c2b85c12ac4aa8cd82201e1ade332557e4380 Mon Sep 17 00:00:00 2001
From: Charles Manning <manningc2@actrix.gen.nz>
Date: Thu, 16 Dec 2010 20:35:56 -0800
Subject: [PATCH 26/32] mtd: nand: omap2: Force all buffer reads to u32 alignment
---
drivers/mtd/nand/omap2.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index bb89c65..832f111 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -247,6 +247,18 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
int ret = 0;
u32 *p = (u32 *)buf;
+ /* u32 align the buffer and read */
+ /* NB: This assumes the buf ptr can be aligned *down* which is a valid.
+ * Assumption when dealing with ecc buffers etc.
+ */
+ u32 addr = (u32)p;
+
+ int diff = addr & 3;
+ addr -= diff;
+ len += diff;
+ len = (len + 3) & ~3;
+ p = (u32 *)addr;
+
/* take care of subpage reads */
if (len % 4) {
if (info->nand.options & NAND_BUSWIDTH_16)
--
1.6.6.1
|
