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authorRichard Purdie <rpurdie@rpsys.net>2006-08-27 01:23:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-27 11:01:29 -0700
commit7fd5aecc5d32882f8e29b14370e9ce2520e7e56f (patch)
tree99fb19859089dae6b5c139df1b563220ec80ffee
parent6946bd636364effce06ea46fe8f8cd6e2edb004e (diff)
downloadlinux-7fd5aecc5d32882f8e29b14370e9ce2520e7e56f.tar.bz2
[PATCH] mtd corruption fix
Read the return value before we release the nand device otherwise the value can become corrupted by another user of chip->ops, ultimately resulting in filesystem corruption. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by: Josh Boyer <jwboyer@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--drivers/mtd/nand/nand_base.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 62b861304e03..c8cbc00243fe 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1093,9 +1093,10 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len,
ret = nand_do_read_ops(mtd, from, &chip->ops);
+ *retlen = chip->ops.retlen;
+
nand_release_device(mtd);
- *retlen = chip->ops.retlen;
return ret;
}
@@ -1691,9 +1692,10 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len,
ret = nand_do_write_ops(mtd, to, &chip->ops);
+ *retlen = chip->ops.retlen;
+
nand_release_device(mtd);
- *retlen = chip->ops.retlen;
return ret;
}