From: Timur Tabi Date: Thu, 13 Jul 2017 20:45:41 +0000 (-0500) Subject: net: qcom/emac: fix double free of SGMII IRQ during shutdown X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c98b0537f0d962b46c62c27b6c2d783257f7400f;p=openwrt%2Fstaging%2Fblogic.git net: qcom/emac: fix double free of SGMII IRQ during shutdown If the interface is not up, then don't try to close it during a shutdown. This avoids possible double free of the IRQ, which can happen during a shutdown. Fixes: 03eb3eb4d4d5 ("net: qcom/emac: add shutdown function") Signed-off-by: Timur Tabi Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index 746d94e28470..60850bfa3d32 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -766,11 +766,13 @@ static void emac_shutdown(struct platform_device *pdev) struct emac_adapter *adpt = netdev_priv(netdev); struct emac_sgmii *sgmii = &adpt->phy; - /* Closing the SGMII turns off its interrupts */ - sgmii->close(adpt); + if (netdev->flags & IFF_UP) { + /* Closing the SGMII turns off its interrupts */ + sgmii->close(adpt); - /* Resetting the MAC turns off all DMA and its interrupts */ - emac_mac_reset(adpt); + /* Resetting the MAC turns off all DMA and its interrupts */ + emac_mac_reset(adpt); + } } static struct platform_driver emac_platform_driver = {