diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-09 10:11:21 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-09 10:11:21 +0300 |
commit | 0154ec71d597692a0d0682b19eac4b3adfb7f3dc (patch) | |
tree | 121b4ac35146f5696da090d3ae2534c76523e6c2 /drivers/char/random.c | |
parent | 9c3cef54c50d93871eaa46c28a06de8bd03fab63 (diff) | |
parent | d1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff) | |
download | linux-0154ec71d597692a0d0682b19eac4b3adfb7f3dc.tar.xz |
Merge 5.2-rc4 into char-misc-next
We want the char/misc driver fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/random.c')
-rw-r--r-- | drivers/char/random.c | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c index a42b3d764da8..5d5ea4ce1442 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -772,8 +772,11 @@ retry: if (cmpxchg(&r->entropy_count, orig, entropy_count) != orig) goto retry; - if (has_initialized) + if (has_initialized) { r->initialized = 1; + wake_up_interruptible(&random_read_wait); + kill_fasync(&fasync, SIGIO, POLL_IN); + } trace_credit_entropy_bits(r->name, nbits, entropy_count >> ENTROPY_SHIFT, _RET_IP_); @@ -789,6 +792,13 @@ retry: entropy_bits = r->entropy_count >> ENTROPY_SHIFT; } + /* initialize the blocking pool if necessary */ + if (entropy_bits >= random_read_wakeup_bits && + !other->initialized) { + schedule_work(&other->push_work); + return; + } + /* should we wake readers? */ if (entropy_bits >= random_read_wakeup_bits && wq_has_sleeper(&random_read_wait)) { @@ -1936,8 +1946,8 @@ _random_read(int nonblock, char __user *buf, size_t nbytes) return -EAGAIN; wait_event_interruptible(random_read_wait, - ENTROPY_BITS(&input_pool) >= - random_read_wakeup_bits); + blocking_pool.initialized && + (ENTROPY_BITS(&input_pool) >= random_read_wakeup_bits)); if (signal_pending(current)) return -ERESTARTSYS; } |