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From:   Felix Fietkau <nbd@nbd.name>
To:     linux-wireless@vger.kernel.org
Subject: [PATCH 4/6] mt76: mt76x02: clean up and fix interrupt masking in the irq handler
Date:   Mon, 10 Aug 2020 10:58:30 +0200
Message-Id: <20200810085832.65662-4-nbd@nbd.name>
In-Reply-To: <20200810085832.65662-1-nbd@nbd.name>
References: <20200810085832.65662-1-nbd@nbd.name>
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Sender: linux-wireless-owner@vger.kernel.org
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Only clear unmasked interrupts. If an interrupt is temporarily masked,
its pending events need to be processed later, even if another interrupt
happened in the mean time.
Disable interrupts in one call before scheduling

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 .../net/wireless/mediatek/mt76/mt76x02_mmio.c | 25 ++++++++-----------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
index 99611515a093..20db80849b09 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mmio.c
@@ -263,9 +263,10 @@ EXPORT_SYMBOL_GPL(mt76x02_rx_poll_complete);
 irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
 {
 	struct mt76x02_dev *dev = dev_instance;
-	u32 intr;
+	u32 intr, mask;
 
 	intr = mt76_rr(dev, MT_INT_SOURCE_CSR);
+	intr &= dev->mt76.mmio.irqmask;
 	mt76_wr(dev, MT_INT_SOURCE_CSR, intr);
 
 	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
@@ -273,17 +274,17 @@ irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
 
 	trace_dev_irq(&dev->mt76, intr, dev->mt76.mmio.irqmask);
 
-	intr &= dev->mt76.mmio.irqmask;
+	mask = intr & (MT_INT_RX_DONE_ALL | MT_INT_GPTIMER);
+	if (intr & (MT_INT_TX_DONE_ALL | MT_INT_TX_STAT))
+		mask |= MT_INT_TX_DONE_ALL;
+
+	mt76x02_irq_disable(dev, mask);
 
-	if (intr & MT_INT_RX_DONE(0)) {
-		mt76x02_irq_disable(dev, MT_INT_RX_DONE(0));
+	if (intr & MT_INT_RX_DONE(0))
 		napi_schedule(&dev->mt76.napi[0]);
-	}
 
-	if (intr & MT_INT_RX_DONE(1)) {
-		mt76x02_irq_disable(dev, MT_INT_RX_DONE(1));
+	if (intr & MT_INT_RX_DONE(1))
 		napi_schedule(&dev->mt76.napi[1]);
-	}
 
 	if (intr & MT_INT_PRE_TBTT)
 		tasklet_schedule(&dev->mt76.pre_tbtt_tasklet);
@@ -299,15 +300,11 @@ irqreturn_t mt76x02_irq_handler(int irq, void *dev_instance)
 	if (intr & MT_INT_TX_STAT)
 		mt76x02_mac_poll_tx_status(dev, true);
 
-	if (intr & (MT_INT_TX_STAT | MT_INT_TX_DONE_ALL)) {
-		mt76x02_irq_disable(dev, MT_INT_TX_DONE_ALL);
+	if (intr & (MT_INT_TX_STAT | MT_INT_TX_DONE_ALL))
 		napi_schedule(&dev->mt76.tx_napi);
-	}
 
-	if (intr & MT_INT_GPTIMER) {
-		mt76x02_irq_disable(dev, MT_INT_GPTIMER);
+	if (intr & MT_INT_GPTIMER)
 		tasklet_schedule(&dev->dfs_pd.dfs_tasklet);
-	}
 
 	return IRQ_HANDLED;
 }
-- 
2.28.0