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| author | imp <imp@FreeBSD.org> | 2007-12-19 22:05:07 +0000 |
|---|---|---|
| committer | imp <imp@FreeBSD.org> | 2007-12-19 22:05:07 +0000 |
| commit | 46b79678a884735323084fdea993485fe44175c6 (patch) | |
| tree | b09d12fd8caa05c7be2c7fbfd19e5cbfd8064f6e /sys/kern/subr_bus.c | |
| parent | 5aac9e4cdb7d5c0e26dc4c4ce308a99bf263d647 (diff) | |
| download | FreeBSD-src-46b79678a884735323084fdea993485fe44175c6.zip FreeBSD-src-46b79678a884735323084fdea993485fe44175c6.tar.gz | |
When devclass_get_maxunit is passed a NULL, return -1 to indicate that
there's nothing allocated at all yet.
Diffstat (limited to 'sys/kern/subr_bus.c')
| -rw-r--r-- | sys/kern/subr_bus.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/kern/subr_bus.c b/sys/kern/subr_bus.c index 420834a..89876d227 100644 --- a/sys/kern/subr_bus.c +++ b/sys/kern/subr_bus.c @@ -1220,13 +1220,16 @@ devclass_get_count(devclass_t dc) * @brief Get the maximum unit number used in a devclass * * Note that this is one greater than the highest currently-allocated - * unit. + * unit. If a null devclass_t is passed in, -1 is returned to indicate + * that not even the devclass has been allocated yet. * * @param dc the devclass to examine */ int devclass_get_maxunit(devclass_t dc) { + if (dc == NULL) + return (-1); return (dc->maxunit); } |
