From: Miaoqing Pan <miaoqing@xxxxxxxxxxxxxx>
In the worst case, ath9k_rng_stop() may take 10s to stop rng kthread.
The time is too long for users, use wait_event_interruptible_timeout()
instead of msleep_interruptible(), wakup immediately once
kthread_should_stop() is true.
Signed-off-by: Miaoqing Pan <miaoqing@xxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/rng.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/ath/ath9k/rng.c b/drivers/net/wireless/ath/ath9k/rng.c
index 73f46fb..f9d3d6e 100644
--- a/drivers/net/wireless/ath/ath9k/rng.c
+++ b/drivers/net/wireless/ath/ath9k/rng.c
@@ -24,6 +24,8 @@
#define ATH9K_RNG_BUF_SIZE 320
#define ATH9K_RNG_ENTROPY(x) (((x) * 8 * 10) >> 5) /* quality: 10/32 */
+static DECLARE_WAIT_QUEUE_HEAD(rng_queue);
+
static int ath9k_rng_data_read(struct ath_softc *sc, u32 *buf, u32 buf_size)
{
int i, j;
@@ -85,7 +87,9 @@ static int ath9k_rng_kthread(void *data)
ATH9K_RNG_BUF_SIZE);
if (unlikely(!bytes_read)) {
delay = ath9k_rng_delay_get(++fail_stats);
- msleep_interruptible(delay);
+ wait_event_interruptible_timeout(rng_queue,
+ kthread_should_stop(),
+ msecs_to_jiffies(delay));
continue;
}
--
1.9.1
