diff options
| author | Robert Watson <rwatson@FreeBSD.org> | 2004-08-11 03:33:32 +0000 |
|---|---|---|
| committer | Robert Watson <rwatson@FreeBSD.org> | 2004-08-11 03:33:32 +0000 |
| commit | 38c9c1708b198018ba6ddfae9ab7e1ebaeed050c (patch) | |
| tree | 2c5637ba69f88f5b788543ee9c74630dc1381b42 /sys/dev/random | |
| parent | 4da47b2fec804742a47b0de6e153f9ae12c68db7 (diff) | |
Notes
Diffstat (limited to 'sys/dev/random')
| -rw-r--r-- | sys/dev/random/randomdev_soft.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sys/dev/random/randomdev_soft.c b/sys/dev/random/randomdev_soft.c index c73e09881b90..6f4851bcfffb 100644 --- a/sys/dev/random/randomdev_soft.c +++ b/sys/dev/random/randomdev_soft.c @@ -296,6 +296,10 @@ random_harvest_internal(u_int64_t somecounter, const void *entropy, { struct harvest *event; + /* Lockless read to avoid lock operations if fifo is full. */ + if (harvestfifo[origin].count >= RANDOM_FIFO_MAX) + return; + /* Lock the particular fifo */ mtx_lock_spin(&harvestfifo[origin].lock); |