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| author | green <green@FreeBSD.org> | 2000-03-15 03:23:04 +0000 |
|---|---|---|
| committer | green <green@FreeBSD.org> | 2000-03-15 03:23:04 +0000 |
| commit | 00e431ccd775f83654f49e976c9478ddbb2e8931 (patch) | |
| tree | 4a880d478321e5a9efbd62a07ee8619f49e6ee3a /sys/dev/ppbus | |
| parent | a18025220fb4314f187c289612aa5f475f226306 (diff) | |
| download | FreeBSD-src-00e431ccd775f83654f49e976c9478ddbb2e8931.zip FreeBSD-src-00e431ccd775f83654f49e976c9478ddbb2e8931.tar.gz | |
I _HATE_ crashes. The lptread() call needs to check LP_BYPASS, because
if one tries to use read() on an LP_BYPASS'd dev_t, the softc will be
initialized mainly with NULLs, so...
Diffstat (limited to 'sys/dev/ppbus')
| -rw-r--r-- | sys/dev/ppbus/lpt.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/dev/ppbus/lpt.c b/sys/dev/ppbus/lpt.c index b83cc03..a7f8dd9 100644 --- a/sys/dev/ppbus/lpt.c +++ b/sys/dev/ppbus/lpt.c @@ -695,6 +695,11 @@ lptread(dev_t dev, struct uio *uio, int ioflag) device_t ppbus = device_get_parent(lptdev); int error = 0, len; + if (sc->sc_flags & LP_BYPASS) { + /* we can't do reads in bypass mode */ + return (EPERM); + } + if ((error = ppb_1284_negociate(ppbus, PPB_NIBBLE, 0))) return (error); |
