From: Yangtao Li <tiny.windzz@xxxxxxxxx> commit 12faac30d157970fdbfa171bbeb1fb88350303b1 upstream. Signed-off-by: Yangtao Li <tiny.windzz@xxxxxxxxx> Link: https://lore.kernel.org/r/20190607182517.28266-2-tiny.windzz@xxxxxxxxx Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/char/random.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -762,7 +762,7 @@ retry: if (entropy_bits < 128) return; crng_reseed(&primary_crng, r); - entropy_bits = r->entropy_count >> ENTROPY_SHIFT; + entropy_bits = ENTROPY_BITS(r); } } } @@ -1394,8 +1394,7 @@ retry: goto retry; trace_debit_entropy(r->name, 8 * ibytes); - if (ibytes && - (r->entropy_count >> ENTROPY_SHIFT) < random_write_wakeup_bits) { + if (ibytes && ENTROPY_BITS(r) < random_write_wakeup_bits) { wake_up_interruptible(&random_write_wait); kill_fasync(&fasync, SIGIO, POLL_OUT); }
