diff options
| -rw-r--r-- | drivers/char/random.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 80b58774e891..89eb5a8dec82 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -710,12 +710,18 @@ struct timer_rand_state { void add_device_randomness(const void *buf, unsigned int size) { unsigned long time = random_get_entropy() ^ jiffies; + unsigned long flags; trace_add_device_randomness(size, _RET_IP_); - mix_pool_bytes(&input_pool, buf, size, NULL); - mix_pool_bytes(&input_pool, &time, sizeof(time), NULL); - mix_pool_bytes(&nonblocking_pool, buf, size, NULL); - mix_pool_bytes(&nonblocking_pool, &time, sizeof(time), NULL); + spin_lock_irqsave(&input_pool.lock, flags); + _mix_pool_bytes(&input_pool, buf, size, NULL); + _mix_pool_bytes(&input_pool, &time, sizeof(time), NULL); + spin_unlock_irqrestore(&input_pool.lock, flags); + + spin_lock_irqsave(&nonblocking_pool.lock, flags); + _mix_pool_bytes(&nonblocking_pool, buf, size, NULL); + _mix_pool_bytes(&nonblocking_pool, &time, sizeof(time), NULL); + spin_unlock_irqrestore(&nonblocking_pool.lock, flags); } EXPORT_SYMBOL(add_device_randomness); |