[PATCH 05/10] wcn36xx: only handle packets when ED or DONE bit is set

[Daniel Mack]

On RX and TX interrupts, check for the WCN36XX_CH_STAT_INT_ED_MASK or
WCN36XX_CH_STAT_INT_DONE_MASK in the interrupt reason register, and
only handle packets when it is set. This way, reap_tx_dxes() is only
invoked when needed.

This brings the dequeing logic in line with what the prima downstream
driver is doing.

While at it, also log the interrupt reason.

Signed-off-by: Daniel Mack <dan...@zonque.org>
---
 drivers/net/wireless/ath/wcn36xx/dxe.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/ath/wcn36xx/dxe.c 
b/drivers/net/wireless/ath/wcn36xx/dxe.c
index d11c9c536627..8c64e05ca3b7 100644
--- a/drivers/net/wireless/ath/wcn36xx/dxe.c
+++ b/drivers/net/wireless/ath/wcn36xx/dxe.c
@@ -430,8 +430,12 @@ static irqreturn_t wcn36xx_irq_tx_complete(int irq, void 
*dev)
                                                   WCN36XX_INT_MASK_CHAN_TX_H);
                }
 
-               wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready high\n");
-               reap_tx_dxes(wcn, &wcn->dxe_tx_h_ch);
+               wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready high, reason %08x\n",
+                           int_reason);
+
+               if (int_reason & (WCN36XX_CH_STAT_INT_DONE_MASK |
+                                 WCN36XX_CH_STAT_INT_ED_MASK))
+                       reap_tx_dxes(wcn, &wcn->dxe_tx_h_ch);
        }
 
        if (int_src & WCN36XX_INT_MASK_CHAN_TX_L) {
@@ -465,8 +469,12 @@ static irqreturn_t wcn36xx_irq_tx_complete(int irq, void 
*dev)
                                                   WCN36XX_INT_MASK_CHAN_TX_L);
                }
 
-               wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready low\n");
-               reap_tx_dxes(wcn, &wcn->dxe_tx_l_ch);
+               wcn36xx_dbg(WCN36XX_DBG_DXE, "dxe tx ready low, reason %08x\n",
+                           int_reason);
+
+               if (int_reason & (WCN36XX_CH_STAT_INT_DONE_MASK |
+                                 WCN36XX_CH_STAT_INT_ED_MASK))
+                       reap_tx_dxes(wcn, &wcn->dxe_tx_l_ch);
        }
 
        return IRQ_HANDLED;
@@ -545,6 +553,10 @@ static int wcn36xx_rx_handle_packets(struct wcn36xx *wcn,
                                           WCN36XX_DXE_0_INT_ED_CLR,
                                           int_mask);
 
+       if (!(int_reason & (WCN36XX_CH_STAT_INT_DONE_MASK |
+                           WCN36XX_CH_STAT_INT_ED_MASK)))
+               return 0;
+
        spin_lock(&ch->lock);
 
        ctl = ch->head_blk_ctl;
-- 
2.14.3