From: David Woodhouse <David.Woodhouse@intel.com>
Date: Tue, 20 Oct 2009 13:02:41 +0000 (+0900)
Subject: Revert "mtd: mxc_nand: fix 2KiB pagesize NAND on i.MX27"
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1cc523999e0acd0c21f83bf89b7a44b4ab6f7bd8;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

Revert "mtd: mxc_nand: fix 2KiB pagesize NAND on i.MX27"

This reverts commit 71b7d0d90d536ae4e70929cc59a1a9f6ba457c6c.

The problem which that commit attempted to fix was a bootloader issue,
which had been misunderstood. The 'fix' causes lots of false bad blocks
for existing users with sane firmware.

Thanks to Mathieu Berland for diagnosing the problem coherently.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index ef3e1998b591..06c531485df9 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -857,17 +857,6 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 	}
 }
 
-/* Define some generic bad / good block scan pattern which are used
- * while scanning a device for factory marked good / bad blocks. */
-static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
-
-static struct nand_bbt_descr smallpage_memorybased = {
-	.options = NAND_BBT_SCAN2NDPAGE,
-	.offs = 5,
-	.len = 1,
-	.pattern = scan_ff_pattern
-};
-
 static int __init mxcnd_probe(struct platform_device *pdev)
 {
 	struct nand_chip *this;
@@ -984,10 +973,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
 		goto escan;
 	}
 
-	if (mtd->writesize == 2048) {
-		host->pagesize_2k = 1;
-		this->badblock_pattern = &smallpage_memorybased;
-	}
+	host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
 
 	if (this->ecc.mode == NAND_ECC_HW) {
 		switch (mtd->oobsize) {