6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Felix Fietkau <nbd@xxxxxxxx>
[ Upstream commit baa19b2e4b7bbb509a7ca7939c8785477dcd40ee ]
It turns out that the code in mt7603_rx_pse_busy() does not detect actual
hardware hangs, it only checks for busy conditions in PSE.
A reset should only be performed if these conditions are true and if there
is no rx activity as well.
Reset the counter whenever a rx interrupt occurs. In order to also deal with
a fully loaded CPU that leaves interrupts disabled with continuous NAPI
polling, also check for pending rx interrupts in the function itself.
Fixes: c8846e101502 ("mt76: add driver for MT7603E and MT7628/7688")
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
.../net/wireless/mediatek/mt76/mt7603/core.c | 2 ++
.../net/wireless/mediatek/mt76/mt7603/mac.c | 23 +++++++++++++------
2 files changed, 18 insertions(+), 7 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/core.c b/drivers/net/wireless/mediatek/mt76/mt7603/core.c
index 60a996b63c0c0..915b8349146af 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/core.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/core.c
@@ -42,11 +42,13 @@ irqreturn_t mt7603_irq_handler(int irq, void *dev_instance)
}
if (intr & MT_INT_RX_DONE(0)) {
+ dev->rx_pse_check = 0;
mt7603_irq_disable(dev, MT_INT_RX_DONE(0));
napi_schedule(&dev->mt76.napi[0]);
}
if (intr & MT_INT_RX_DONE(1)) {
+ dev->rx_pse_check = 0;
mt7603_irq_disable(dev, MT_INT_RX_DONE(1));
napi_schedule(&dev->mt76.napi[1]);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
index 6cff346d57a78..541dc1da94c00 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7603/mac.c
@@ -1559,20 +1559,29 @@ static bool mt7603_rx_pse_busy(struct mt7603_dev *dev)
{
u32 addr, val;
- if (mt76_rr(dev, MT_MCU_DEBUG_RESET) & MT_MCU_DEBUG_RESET_QUEUES)
- return true;
-
if (mt7603_rx_fifo_busy(dev))
- return false;
+ goto out;
addr = mt7603_reg_map(dev, MT_CLIENT_BASE_PHYS_ADDR + MT_CLIENT_STATUS);
mt76_wr(dev, addr, 3);
val = mt76_rr(dev, addr) >> 16;
- if (is_mt7628(dev) && (val & 0x4001) == 0x4001)
- return true;
+ if (!(val & BIT(0)))
+ return false;
+
+ if (is_mt7628(dev))
+ val &= 0xa000;
+ else
+ val &= 0x8000;
+ if (!val)
+ return false;
+
+out:
+ if (mt76_rr(dev, MT_INT_SOURCE_CSR) &
+ (MT_INT_RX_DONE(0) | MT_INT_RX_DONE(1)))
+ return false;
- return (val & 0x8001) == 0x8001 || (val & 0xe001) == 0xe001;
+ return true;
}
static bool
--
2.42.0
