linux-kernel - [-mm patch 2/3] AVR32 MTD: Unlock flash if necessary (try 2)

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Date:	Fri, 15 Sep 2006 16:37:11 +0200
From:	Haavard Skinnemoen <hskinnemoen@...el.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	David Woodhouse <dwmw2@...radead.org>
Subject: [-mm patch 2/3] AVR32 MTD: Unlock flash if necessary (try 2)

If a cfi_cmdset_0002 fixup installs an unlock() operation, use it
to unlock the whole flash after the erase regions have been set up.

I wanted to do this in the fixup itself, but it wouldn't work because
the erase regions hadn't been initialized, and mtd->size was zero.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@...el.com>
---
 drivers/mtd/chips/cfi_cmdset_0002.c |    9 +++++++++
 1 file changed, 9 insertions(+)

Index: linux-2.6.18-rc6-mm2/drivers/mtd/chips/cfi_cmdset_0002.c
===================================================================
--- linux-2.6.18-rc6-mm2.orig/drivers/mtd/chips/cfi_cmdset_0002.c	2006-09-15 14:39:40.000000000 +0200
+++ linux-2.6.18-rc6-mm2/drivers/mtd/chips/cfi_cmdset_0002.c	2006-09-15 15:45:41.000000000 +0200
@@ -416,6 +416,15 @@ static struct mtd_info *cfi_amdstd_setup
 	}
 #endif
 
+	/*
+	 * If an unlock() operation was installed by a fixup, use it
+	 * now to unlock the whole flash.
+	 */
+	if (mtd->unlock && mtd->unlock(mtd, 0, mtd->size))
+		printk(KERN_WARNING "%s: unlock failed, writes may not work\n",
+		       map->name);
+
+
 	/* FIXME: erase-suspend-program is broken.  See
 	   http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */
 	printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n");
-
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