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| author | Julien Brunel <brunel@diku.dk> | 2008-09-26 15:27:25 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-09-26 19:24:37 +0300 |
| commit | 0e4a008a4f389b468cfe8b58c7d77882a6e25695 (patch) | |
| tree | 51a3cd9d3bc1cbcf7a09c8cfb7ac866e6215ce4f /drivers | |
| parent | 7d200e88cbdff5334d23d3af8d444eb9cc041962 (diff) | |
| download | op-kernel-dev-0e4a008a4f389b468cfe8b58c7d77882a6e25695.zip op-kernel-dev-0e4a008a4f389b468cfe8b58c7d77882a6e25695.tar.gz | |
UBI: fix IS_ERR test
In case of error, the function add_volume returns an ERR pointer. The
result of IS_ERR, which is supposed to be used in a test as it is, is
here checked to be less than zero, which seems odd. We suggest to
replace this test by a simple IS_ERR test.
A simplified version of the semantic match that finds this problem is
as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@def0@
expression x;
position p0;
@@
x@p0 = add_volume(...)
@protected@
expression def0.x,E;
position def0.p0;
position p;
statement S;
@@
x@p0
... when != x = E
if (!IS_ERR(x) && ...) {<... x@p ...>} else S
@unprotected@
expression def0.x,E;
identifier fld;
position def0.p0;
position p != protected.p;
@@
x@p0
... when != x = E
* x@p->fld
// </smpl>
Signed-off-by: Julien Brunel <brunel@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/ubi/scan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/ubi/scan.c b/drivers/mtd/ubi/scan.c index 967bb44..4f2daa5 100644 --- a/drivers/mtd/ubi/scan.c +++ b/drivers/mtd/ubi/scan.c @@ -387,7 +387,7 @@ int ubi_scan_add_used(struct ubi_device *ubi, struct ubi_scan_info *si, pnum, vol_id, lnum, ec, sqnum, bitflips); sv = add_volume(si, vol_id, pnum, vid_hdr); - if (IS_ERR(sv) < 0) + if (IS_ERR(sv)) return PTR_ERR(sv); if (si->max_sqnum < sqnum) |
