diff options
| -rw-r--r-- | drivers/char/random.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index 2c532a6b0a21..9675821b4b5a 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -984,14 +984,10 @@ retry: ibytes = 0; } else { /* If limited, never pull more than available */ - if (r->limit && ibytes + reserved >= have_bytes) - ibytes = have_bytes - reserved; - - if (have_bytes >= ibytes + reserved) - entropy_count -= ibytes << (ENTROPY_SHIFT + 3); - else - entropy_count = reserved << (ENTROPY_SHIFT + 3); - + if (r->limit) + ibytes = min_t(size_t, ibytes, have_bytes - reserved); + entropy_count = max_t(int, 0, + entropy_count - (ibytes << (ENTROPY_SHIFT + 3))); if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig) goto retry; |