ath10k: remove wmi pending count limit

It is no longer used nor necessary since WMI
commands can block.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

4 files changed, 0 insertions, 45 deletions

diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h
index 14b7d3de6883..c2b6a766dabd 100644
--- a/drivers/net/wireless/ath/ath10k/core.h
+++ b/drivers/net/wireless/ath/ath10k/core.h
@@ -112,8 +112,6 @@ struct ath10k_wmi {
         enum ath10k_htc_ep_id eid;
         struct completion service_ready;
         struct completion unified_ready;
-        atomic_t pending_tx_count;
-        wait_queue_head_t wq;
         wait_queue_head_t tx_credits_wq;
 
         struct sk_buff_head wmi_event_list;
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c
index 6c3e9d1f80d9..11aa13e7587f 100644
--- a/drivers/net/wireless/ath/ath10k/mac.c
+++ b/drivers/net/wireless/ath/ath10k/mac.c
@@ -1224,8 +1224,6 @@ static void ath10k_bss_disassoc(struct ieee80211_hw *hw,
         /* FIXME: why don't we print error if wmi call fails? */
         ret = ath10k_wmi_vdev_down(ar, arvif->vdev_id);
 
-        ath10k_wmi_flush_tx(ar);
-
         arvif->def_wep_key_index = 0;
 }
 
@@ -1664,8 +1662,6 @@ static int ath10k_abort_scan(struct ath10k *ar)
                 return -EIO;
         }
 
-        ath10k_wmi_flush_tx(ar);
-
         ret = wait_for_completion_timeout(&ar->scan.completed, 3*HZ);
         if (ret == 0)
                 ath10k_warn("timed out while waiting for scan to stop\n");
@@ -1699,10 +1695,6 @@ static int ath10k_start_scan(struct ath10k *ar,
         if (ret)
                 return ret;
 
-        /* make sure we submit the command so the completion
-        * timeout makes sense */
-        ath10k_wmi_flush_tx(ar);
-
         ret = wait_for_completion_timeout(&ar->scan.started, 1*HZ);
         if (ret == 0) {
                 ath10k_abort_scan(ar);
@@ -1924,7 +1916,6 @@ static int ath10k_config(struct ieee80211_hw *hw, u32 changed)
                         ret = ath10k_monitor_destroy(ar);
         }
 
-        ath10k_wmi_flush_tx(ar);
         mutex_unlock(&ar->conf_mutex);
         return ret;
 }
diff --git a/drivers/net/wireless/ath/ath10k/wmi.c b/drivers/net/wireless/ath/ath10k/wmi.c
index 9152daea9d96..b29d2b954c0e 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -23,30 +23,6 @@
 #include "wmi.h"
 #include "mac.h"
 
-void ath10k_wmi_flush_tx(struct ath10k *ar)
-{
-        int ret;
-
-        lockdep_assert_held(&ar->conf_mutex);
-
-        if (ar->state == ATH10K_STATE_WEDGED) {
-                ath10k_warn("wmi flush skipped - device is wedged anyway\n");
-                return;
-        }
-
-        ret = wait_event_timeout(ar->wmi.wq,
-                                 atomic_read(&ar->wmi.pending_tx_count) == 0,
-                                 5*HZ);
-        if (atomic_read(&ar->wmi.pending_tx_count) == 0)
-                return;
-
-        if (ret == 0)
-                ret = -ETIMEDOUT;
-
-        if (ret < 0)
-                ath10k_warn("wmi flush failed (%d)\n", ret);
-}
-
 int ath10k_wmi_wait_for_service_ready(struct ath10k *ar)
 {
         int ret;
@@ -85,9 +61,6 @@ static struct sk_buff *ath10k_wmi_alloc_skb(u32 len)
 static void ath10k_wmi_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb)
 {
         dev_kfree_skb(skb);
-
-        if (atomic_sub_return(1, &ar->wmi.pending_tx_count) == 0)
-                wake_up(&ar->wmi.wq);
 }
 
 static int ath10k_wmi_cmd_send_nowait(struct ath10k *ar, struct sk_buff *skb,
@@ -1243,7 +1216,6 @@ int ath10k_wmi_attach(struct ath10k *ar)
 {
         init_completion(&ar->wmi.service_ready);
         init_completion(&ar->wmi.unified_ready);
-        init_waitqueue_head(&ar->wmi.wq);
         init_waitqueue_head(&ar->wmi.tx_credits_wq);
 
         skb_queue_head_init(&ar->wmi.wmi_event_list);
@@ -1254,10 +1226,6 @@ int ath10k_wmi_attach(struct ath10k *ar)
 
 void ath10k_wmi_detach(struct ath10k *ar)
 {
-        /* HTC should've drained the packets already */
-        if (WARN_ON(atomic_read(&ar->wmi.pending_tx_count) > 0))
-                ath10k_warn("there are still pending packets\n");
-
         cancel_work_sync(&ar->wmi.wmi_event_work);
         skb_queue_purge(&ar->wmi.wmi_event_list);
 }
diff --git a/drivers/net/wireless/ath/ath10k/wmi.h b/drivers/net/wireless/ath/ath10k/wmi.h
index b100431f2241..2c52c23107dd 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.h
+++ b/drivers/net/wireless/ath/ath10k/wmi.h
@@ -3044,7 +3044,6 @@ struct wmi_force_fw_hang_cmd {
 
 #define WMI_MAX_EVENT 0x1000
 /* Maximum number of pending TXed WMI packets */
-#define WMI_MAX_PENDING_TX_COUNT 128
 #define WMI_SKB_HEADROOM sizeof(struct wmi_cmd_hdr)
 
 /* By default disable power save for IBSS */
@@ -3057,7 +3056,6 @@ int ath10k_wmi_attach(struct ath10k *ar);
 void ath10k_wmi_detach(struct ath10k *ar);
 int ath10k_wmi_wait_for_service_ready(struct ath10k *ar);
 int ath10k_wmi_wait_for_unified_ready(struct ath10k *ar);
-void ath10k_wmi_flush_tx(struct ath10k *ar);
 
 int ath10k_wmi_connect_htc_service(struct ath10k *ar);
 int ath10k_wmi_pdev_set_channel(struct ath10k *ar,