[PATCH v4 2/4] vdpa/octeon_ep: handle device config change events

[Shijith Thotton]

From: Satha Rao <skoteshwar@xxxxxxxxxxx>

The first interrupt of the device is used to notify the host about
device configuration changes, such as link status updates. The ISR
configuration area is updated to indicate a config change event when
triggered.

Signed-off-by: Satha Rao <skoteshwar@xxxxxxxxxxx>
Reviewed-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Signed-off-by: Shijith Thotton <sthotton@xxxxxxxxxxx>
---
 drivers/vdpa/octeon_ep/octep_vdpa_main.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/vdpa/octeon_ep/octep_vdpa_main.c b/drivers/vdpa/octeon_ep/octep_vdpa_main.c
index e9c3e57b321f..4d56be64ae56 100644
--- a/drivers/vdpa/octeon_ep/octep_vdpa_main.c
+++ b/drivers/vdpa/octeon_ep/octep_vdpa_main.c
@@ -71,6 +71,14 @@ static irqreturn_t octep_vdpa_intr_handler(int irq, void *data)
 		}
 	}
 
+	/* Check for config interrupt. Config uses the first interrupt */
+	if (unlikely(irq == oct_hw->irqs[0] && ioread8(oct_hw->isr))) {
+		iowrite8(0, oct_hw->isr);
+
+		if (oct_hw->config_cb.callback)
+			oct_hw->config_cb.callback(oct_hw->config_cb.private);
+	}
+
 	return IRQ_HANDLED;
 }
 
-- 
2.25.1