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From 686ee9491d8566eff95cf728eb5d6c9921f92bd2 Mon Sep 17 00:00:00 2001
From: Haavard Skinnemoen <hskinnemoen@atmel.com>
Date: Tue, 28 Nov 2006 12:56:51 +0100
Subject: [PATCH] MTD: jffs2_can_mark_obsolete() should return 0 for dataflash
Attempting to write something to a file on a jffs2 filesystem using
mtd_dataflash often results in the following BUG:
jffs2_flash_writev(): Non-contiguous write to 00825720
wbuf was previously 00825300-0082530c
kernel BUG at /home/hskinnemoen/git/linux-devel/fs/jffs2/wbuf.c:786!
Fix this by returning 0 from jffs2_can_mark_obsolete() when running
on top of dataflash.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
---
fs/jffs2/os-linux.h | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index 9f41fc0..a037fa4 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -106,7 +106,8 @@ static inline void jffs2_init_inode_info
#ifdef CONFIG_JFFS2_SUMMARY
#define jffs2_can_mark_obsolete(c) (0)
#else
-#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE))
+#define jffs2_can_mark_obsolete(c) (c->mtd->flags & (MTD_BIT_WRITEABLE) \
+ && !jffs2_dataflash(c))
#endif
#define jffs2_cleanmarker_oob(c) (c->mtd->type == MTD_NANDFLASH)
--
1.4.3.3
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