From 03eb3eb4d4d56414efbe05a5521b2fc4ce175cb7 Mon Sep 17 00:00:00 2001 From: Timur Tabi Date: Fri, 23 Jun 2017 14:33:28 -0500 Subject: [PATCH] net: qcom/emac: add shutdown function The shutdown function halts all DMA and interrupts, so that all operations are discontinued when the system shuts down, e.g. via kexec or a forced reboot. Tested-by: Tyler Baicar Signed-off-by: Timur Tabi Signed-off-by: David S. Miller --- drivers/net/ethernet/qualcomm/emac/emac.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index 98a326faea29..77c5c929f141 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -762,6 +762,19 @@ static int emac_remove(struct platform_device *pdev) return 0; } +static void emac_shutdown(struct platform_device *pdev) +{ + struct net_device *netdev = dev_get_drvdata(&pdev->dev); + struct emac_adapter *adpt = netdev_priv(netdev); + struct emac_sgmii *sgmii = &adpt->phy; + + /* Closing the SGMII turns off its interrupts */ + sgmii->close(adpt); + + /* Resetting the MAC turns off all DMA and its interrupts */ + emac_mac_reset(adpt); +} + static struct platform_driver emac_platform_driver = { .probe = emac_probe, .remove = emac_remove, @@ -770,6 +783,7 @@ static struct platform_driver emac_platform_driver = { .of_match_table = emac_dt_match, .acpi_match_table = ACPI_PTR(emac_acpi_match), }, + .shutdown = emac_shutdown, }; module_platform_driver(emac_platform_driver);