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fs/romfs: correct error-handling code 

romfs_iget returns an ERR_PTR value in an error case instead of NULL.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@match exists@
expression x, E;
statement S1, S2;
@@

x = romfs_iget(...)
... when != x = E
(
*  if (x == NULL || ...) S1 else S2
|
*  if (x == NULL && ...) S1 else S2
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Julia Lawall 2009-09-23 15:57:35 -07:00 committed by Linus Torvalds
parent 9e5f1138d7
commit a21f3c2a04
1 changed files with 1 additions and 1 deletions
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2
fs/romfs/super.c
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@ -528,7 +528,7 @@ static int romfs_fill_super(struct super_block *sb, void *data, int silent)
pos = (ROMFH_SIZE + len + 1 + ROMFH_PAD) & ROMFH_MASK;
root = romfs_iget(sb, pos);
if (!root)
if (IS_ERR(root))
goto error;
sb->s_root = d_alloc_root(root);