5 files changed, 40 insertions, 48 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index ef6f5ea06c1f..3ccf8cfc6b63 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -1071,8 +1071,9 @@ struct ath_softc {
 #endif
 
 #ifdef CONFIG_ATH9K_HWRNG
+	struct hwrng rng_ops;
 	u32 rng_last;
-	struct task_struct *rng_task;
+	char rng_name[sizeof("ath9k_65535")];
 #endif
 };
 
diff --git a/drivers/net/wireless/ath/ath9k/eeprom.c b/drivers/net/wireless/ath/ath9k/eeprom.c
index e6b3cd49ea18..efb7889142d4 100644
--- a/drivers/net/wireless/ath/ath9k/eeprom.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom.c
@@ -670,8 +670,6 @@ void ath9k_hw_get_gain_boundaries_pdadcs(struct ath_hw *ah,
 
 int ath9k_hw_eeprom_init(struct ath_hw *ah)
 {
-	int status;
-
 	if (AR_SREV_9300_20_OR_LATER(ah))
 		ah->eep_ops = &eep_ar9300_ops;
 	else if (AR_SREV_9287(ah)) {
@@ -685,7 +683,5 @@ int ath9k_hw_eeprom_init(struct ath_hw *ah)
 	if (!ah->eep_ops->fill_eeprom(ah))
 		return -EIO;
 
-	status = ah->eep_ops->check_eeprom(ah);
-
-	return status;
+	return ah->eep_ops->check_eeprom(ah);
 }
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index 510e61e97dbc..994ec48b2f66 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -30,6 +30,7 @@ static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
 	hdr->endpoint_id = epid;
 	hdr->flags = flags;
 	hdr->payload_len = cpu_to_be16(len);
+	memset(hdr->control, 0, sizeof(hdr->control));
 
 	status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb);
 
@@ -272,6 +273,10 @@ int htc_connect_service(struct htc_target *target,
 	conn_msg->dl_pipeid = endpoint->dl_pipeid;
 	conn_msg->ul_pipeid = endpoint->ul_pipeid;
 
+	/* To prevent infoleak */
+	conn_msg->svc_meta_len = 0;
+	conn_msg->pad = 0;
+
 	ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
 	if (ret)
 		goto err;
diff --git a/drivers/net/wireless/ath/ath9k/mci.c b/drivers/net/wireless/ath/ath9k/mci.c
index 39d46c203f6b..039bf0c35fbe 100644
--- a/drivers/net/wireless/ath/ath9k/mci.c
+++ b/drivers/net/wireless/ath/ath9k/mci.c
@@ -43,7 +43,7 @@ static bool ath_mci_add_profile(struct ath_common *common,
 				struct ath_mci_profile_info *info)
 {
 	struct ath_mci_profile_info *entry;
-	u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };
+	static const u8 voice_priority[] = { 110, 110, 110, 112, 110, 110, 114, 116, 118 };
 
 	if ((mci->num_sco == ATH_MCI_MAX_SCO_PROFILE) &&
 	    (info->type == MCI_GPM_COEX_PROFILE_VOICE))
diff --git a/drivers/net/wireless/ath/ath9k/rng.c b/drivers/net/wireless/ath/ath9k/rng.c
index f9d3d6eedd3c..cb5414265a9b 100644
--- a/drivers/net/wireless/ath/ath9k/rng.c
+++ b/drivers/net/wireless/ath/ath9k/rng.c
@@ -21,11 +21,6 @@
 #include "hw.h"
 #include "ar9003_phy.h"
 
-#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;
@@ -71,61 +66,56 @@ static u32 ath9k_rng_delay_get(u32 fail_stats)
 	return delay;
 }
 
-static int ath9k_rng_kthread(void *data)
+static int ath9k_rng_read(struct hwrng *rng, void *buf, size_t max, bool wait)
 {
-	int bytes_read;
-	struct ath_softc *sc = data;
-	u32 *rng_buf;
-	u32 delay, fail_stats = 0;
-
-	rng_buf = kmalloc_array(ATH9K_RNG_BUF_SIZE, sizeof(u32), GFP_KERNEL);
-	if (!rng_buf)
-		goto out;
-
-	while (!kthread_should_stop()) {
-		bytes_read = ath9k_rng_data_read(sc, rng_buf,
-						 ATH9K_RNG_BUF_SIZE);
-		if (unlikely(!bytes_read)) {
-			delay = ath9k_rng_delay_get(++fail_stats);
-			wait_event_interruptible_timeout(rng_queue,
-							 kthread_should_stop(),
-							 msecs_to_jiffies(delay));
-			continue;
+	struct ath_softc *sc = container_of(rng, struct ath_softc, rng_ops);
+	u32 fail_stats = 0, word;
+	int bytes_read = 0;
+
+	for (;;) {
+		if (max & ~3UL)
+			bytes_read = ath9k_rng_data_read(sc, buf, max >> 2);
+		if ((max & 3UL) && ath9k_rng_data_read(sc, &word, 1)) {
+			memcpy(buf + bytes_read, &word, max & 3UL);
+			bytes_read += max & 3UL;
+			memzero_explicit(&word, sizeof(word));
 		}
+		if (!wait || !max || likely(bytes_read) || fail_stats > 110)
+			break;
 
-		fail_stats = 0;
-
-		/* sleep until entropy bits under write_wakeup_threshold */
-		add_hwgenerator_randomness((void *)rng_buf, bytes_read,
-					   ATH9K_RNG_ENTROPY(bytes_read));
+		msleep_interruptible(ath9k_rng_delay_get(++fail_stats));
 	}
 
-	kfree(rng_buf);
-out:
-	sc->rng_task = NULL;
-
-	return 0;
+	if (wait && !bytes_read && max)
+		bytes_read = -EIO;
+	return bytes_read;
 }
 
 void ath9k_rng_start(struct ath_softc *sc)
 {
+	static atomic_t serial = ATOMIC_INIT(0);
 	struct ath_hw *ah = sc->sc_ah;
 
-	if (sc->rng_task)
+	if (sc->rng_ops.read)
 		return;
 
 	if (!AR_SREV_9300_20_OR_LATER(ah))
 		return;
 
-	sc->rng_task = kthread_run(ath9k_rng_kthread, sc, "ath9k-hwrng");
-	if (IS_ERR(sc->rng_task))
-		sc->rng_task = NULL;
+	snprintf(sc->rng_name, sizeof(sc->rng_name), "ath9k_%u",
+		 (atomic_inc_return(&serial) - 1) & U16_MAX);
+	sc->rng_ops.name = sc->rng_name;
+	sc->rng_ops.read = ath9k_rng_read;
+	sc->rng_ops.quality = 320;
+
+	if (devm_hwrng_register(sc->dev, &sc->rng_ops))
+		sc->rng_ops.read = NULL;
 }
 
 void ath9k_rng_stop(struct ath_softc *sc)
 {
-	if (sc->rng_task) {
-		kthread_stop(sc->rng_task);
-		sc->rng_task = NULL;
+	if (sc->rng_ops.read) {
+		devm_hwrng_unregister(sc->dev, &sc->rng_ops);
+		sc->rng_ops.read = NULL;
 	}
 }