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From 64e4fc11b960da97728e0d87dcf4c1e98f808501 Mon Sep 17 00:00:00 2001
From: Steve Sakoman <steve@sakoman.com>
Date: Thu, 31 Dec 2009 07:05:02 -0800
Subject: [PATCH] MTD: NAND: omap2: proper fix for subpage read ECC errors
---
drivers/mtd/nand/omap2.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index 1bb799f..75004fe 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -295,11 +295,14 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
u32 *p = (u32 *)buf;
/* take care of subpage reads */
- for (; len % 4 != 0; ) {
- *buf++ = __raw_readb(info->nand.IO_ADDR_R);
- len--;
+ if (len % 4) {
+ if (info->nand.options & NAND_BUSWIDTH_16)
+ omap_read_buf16(mtd, buf, len % 4);
+ else
+ omap_read_buf8(mtd, buf, len % 4);
+ p = (u32 *) (buf + len % 4);
+ len -= len % 4;
}
- p = (u32 *) buf;
/* configure and start prefetch transfer */
ret = gpmc_prefetch_enable(info->gpmc_cs, 0x0, len, 0x0);
--
1.6.5
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