linux-kernel - [02/90] mtd: mtdoops: skip reading initially bad blocks

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Message-Id: <20120123234023.157598016@clark.kroah.org>
Date:	Mon, 23 Jan 2012 15:38:48 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Roman Tereshonkov <roman.tereshonkov@...ia.com>,
	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
	David Woodhouse <David.Woodhouse@...el.com>
Subject: [02/90] mtd: mtdoops: skip reading initially bad blocks

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Roman Tereshonkov <roman.tereshonkov@...ia.com>

commit 3538c56329936c78f7d356889908790006d0124c upstream.

Use block_isbad to check and skip the bad blocks reading.
This will allow to get rid of the read errors if bad blocks
are present initially.

Signed-off-by: Roman Tereshonkov <roman.tereshonkov@...ia.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/mtd/mtdoops.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/mtd/mtdoops.c
+++ b/drivers/mtd/mtdoops.c
@@ -253,6 +253,9 @@ static void find_next_position(struct mt
 	size_t retlen;
 
 	for (page = 0; page < cxt->oops_pages; page++) {
+		if (mtd->block_isbad &&
+		    mtd->block_isbad(mtd, page * record_size))
+			continue;
 		/* Assume the page is used */
 		mark_page_used(cxt, page);
 		ret = mtd->read(mtd, page * record_size, MTDOOPS_HEADER_SIZE,


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