diff options
| author | brueffer <brueffer@FreeBSD.org> | 2009-10-22 06:51:29 +0000 |
|---|---|---|
| committer | brueffer <brueffer@FreeBSD.org> | 2009-10-22 06:51:29 +0000 |
| commit | 0567fca14237a5e9677251587101c8729486038f (patch) | |
| tree | 06591a3e67ce88987a42af8796cde64f6ccc600c /sys/dev/ppbus/pcfclock.c | |
| parent | 245a0bbb51844df0e40b284c191c7ba500ad62ae (diff) | |
| download | FreeBSD-src-0567fca14237a5e9677251587101c8729486038f.zip FreeBSD-src-0567fca14237a5e9677251587101c8729486038f.tar.gz | |
Check pointer for NULL before dereferencing it, not after.
PR: 138387, 138388
Submitted by: Patroklos Argyroudis <argp@census-labs.com>
MFC after: 1 week
Diffstat (limited to 'sys/dev/ppbus/pcfclock.c')
| -rw-r--r-- | sys/dev/ppbus/pcfclock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/dev/ppbus/pcfclock.c b/sys/dev/ppbus/pcfclock.c index e59a891..65612a2 100644 --- a/sys/dev/ppbus/pcfclock.c +++ b/sys/dev/ppbus/pcfclock.c @@ -150,12 +150,14 @@ static int pcfclock_open(struct cdev *dev, int flag, int fms, struct thread *td) { struct pcfclock_data *sc = dev->si_drv1; - device_t pcfclockdev = sc->dev; - device_t ppbus = device_get_parent(pcfclockdev); + device_t pcfclockdev; + device_t ppbus; int res; if (!sc) return (ENXIO); + pcfclockdev = sc->dev; + ppbus = device_get_parent(pcfclockdev); ppb_lock(ppbus); res = ppb_request_bus(ppbus, pcfclockdev, |
