netdev - [PATCH 5/8] dpaa2-switch: do not clear any interrupts automatically

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Date: Mon,  4 Dec 2023 18:35:25 +0200
From: Ioana Ciornei <ioana.ciornei@....com>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	netdev@...r.kernel.org
Cc: Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH 5/8] dpaa2-switch: do not clear any interrupts automatically

The dpsw_get_irq_status() can clear interrupts automatically based on
the value stored in the 'status' variable passed to it. We don't want
that to happen because we could get into a situation when we are
clearing more interrupts that we actually handled.

Just resort to manually clearing interrupts after we received them using
the dpsw_clear_irq_status().

Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
index e91ade7c7c93..d9906573f71f 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-switch.c
@@ -1509,7 +1509,7 @@ static irqreturn_t dpaa2_switch_irq0_handler_thread(int irq_num, void *arg)
 	struct device *dev = (struct device *)arg;
 	struct ethsw_core *ethsw = dev_get_drvdata(dev);
 	struct ethsw_port_priv *port_priv;
-	u32 status = ~0;
+	u32 status = 0;
 	int err, if_id;
 	bool had_mac;
 
@@ -1539,12 +1539,12 @@ static irqreturn_t dpaa2_switch_irq0_handler_thread(int irq_num, void *arg)
 			dpaa2_switch_port_connect_mac(port_priv);
 	}
 
-out:
 	err = dpsw_clear_irq_status(ethsw->mc_io, 0, ethsw->dpsw_handle,
 				    DPSW_IRQ_INDEX_IF, status);
 	if (err)
 		dev_err(dev, "Can't clear irq status (err %d)\n", err);
 
+out:
 	return IRQ_HANDLED;
 }
 
-- 
2.25.1