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From: Sascha Hauer <s.hauer@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 5/5] nand omap: handle erased pages correctly in hamming ecc mode
Date: Mon, 11 Apr 2011 16:10:36 +0200	[thread overview]
Message-ID: <1302531036-27906-6-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1302531036-27906-1-git-send-email-s.hauer@pengutronix.de>

do not throw ecc errors on erased pages.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/mtd/nand/nand_omap_gpmc.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/nand_omap_gpmc.c b/drivers/mtd/nand/nand_omap_gpmc.c
index d61f7d9..9d375aa 100644
--- a/drivers/mtd/nand/nand_omap_gpmc.c
+++ b/drivers/mtd/nand/nand_omap_gpmc.c
@@ -377,6 +377,11 @@ static int omap_correct_data(struct mtd_info *mtd, uint8_t *dat,
 
 	switch (oinfo->ecc_mode) {
 	case OMAP_ECC_HAMMING_CODE_HW_ROMCODE:
+		if (read_ecc[0] == 0xff && read_ecc[1] == 0xff &&
+				read_ecc[2] == 0xff && calc_ecc[0] == 0x0 &&
+				calc_ecc[1] == 0x0 && calc_ecc[0] == 0x0)
+			break;
+
 		/* Regenerate the orginal ECC */
 		orig_ecc = gen_true_ecc(read_ecc);
 		new_ecc = gen_true_ecc(calc_ecc);
-- 
1.7.2.3


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      parent reply	other threads:[~2011-04-11 14:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-11 14:10 omap nand patches Sascha Hauer
2011-04-11 14:10 ` [PATCH 1/5] nand omap: fix hamming romcode ecc code Sascha Hauer
2011-04-11 14:10 ` [PATCH 2/5] nand omap: turn debug messages into dev_dbg Sascha Hauer
2011-04-11 14:10 ` [PATCH 3/5] nand omap: use standard debug functions Sascha Hauer
2011-04-11 14:10 ` [PATCH 4/5] nand omap: use xzalloc instead of calloc Sascha Hauer
2011-04-11 14:10 ` Sascha Hauer [this message]

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