On some platforms, such as iMX6 with PCIe devices, crashes or hangs can
occur if the axienet device continues to perform DMA transfers after
parent devices/busses have been shut down. Shut down the axienet
interface during its shutdown callback in order to avoid this.
Signed-off-by: Robert Hancock <hanc...@sedsystems.ca>
---
drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 947fa5d..3112724 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -1780,9 +1780,23 @@ static int axienet_remove(struct platform_device *pdev)
return 0;
}
+static void axienet_shutdown(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+
+ rtnl_lock();
+ netif_device_detach(ndev);
+
+ if (netif_running(ndev))
+ dev_close(ndev);
+
+ rtnl_unlock();
+}
+
static struct platform_driver axienet_driver = {
.probe = axienet_probe,
.remove = axienet_remove,
+ .shutdown = axienet_shutdown,
.driver = {
.name = "xilinx_axienet",
.of_match_table = axienet_of_match,
--
1.8.3.1
