ath9k_htc: Add a timer to cleanup WMI events

Occasionally, a WMI event would arrive ahead of the TX
URB completion handler. Discarding these events would exhaust
the available TX slots, so handle them by running a timer
cleaning up such events. Also, timeout packets for which TX
completion events have not arrived.

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/wmi.h b/drivers/net/wireless/ath/ath9k/wmi.h
index 44b17385374..310d94eaed1 100644
--- a/drivers/net/wireless/ath/ath9k/wmi.h
+++ b/drivers/net/wireless/ath/ath9k/wmi.h
@@ -130,6 +130,12 @@ struct register_write {
         __be32 val;
 };
 
+struct ath9k_htc_tx_event {
+        int count;
+        struct __wmi_event_txstatus txs;
+        struct list_head list;
+};
+
 struct wmi {
         struct ath9k_htc_priv *drv_priv;
         struct htc_target *htc;
@@ -144,6 +150,9 @@ struct wmi {
         u32 cmd_rsp_len;
         bool stopped;
 
+        struct list_head pending_tx_events;
+        spinlock_t event_lock;
+
         spinlock_t wmi_lock;
 
         atomic_t mwrite_cnt;