From: Lucas Stach l.stach@pengutronix.de

[ upstream commit 32cba57ba74be58589aeb4cb6496183e46a5e3e5 ]

This function frees resources and cancels delayed work item that have been initialized in fec_ptp_init().

Use this to do proper error handling if something goes wrong in probe function after fec_ptp_init has been called.

Signed-off-by: Lucas Stach l.stach@pengutronix.de Acked-by: Fugang Duan B38611@freescale.com Signed-off-by: David S. Miller davem@davemloft.net [groeck: backport: context changes in .../fec_main.c] Signed-off-by: Guenter Roeck linux@roeck-us.net --- Not really sure if I should send this one to David or Greg, since v3.18 is no longer officially supported, so I am sending it to both. Sorry for the noise.

This patch fixes a crash seen when running sabrelite images in a version of qemu which fixes https://bugs.launchpad.net/qemu/+bug/1753309.

drivers/net/ethernet/freescale/fec.h | 1 + drivers/net/ethernet/freescale/fec_main.c | 5 ++--- drivers/net/ethernet/freescale/fec_ptp.c | 10 ++++++++++ 3 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec.h b/drivers/net/ethernet/freescale/fec.h index 9af296a1ca99..c16b6deff5ea 100644 --- a/drivers/net/ethernet/freescale/fec.h +++ b/drivers/net/ethernet/freescale/fec.h @@ -546,6 +546,7 @@ struct fec_enet_private { };

void fec_ptp_init(struct platform_device *pdev); +void fec_ptp_stop(struct platform_device *pdev); void fec_ptp_start_cyclecounter(struct net_device *ndev); int fec_ptp_set(struct net_device *ndev, struct ifreq *ifr); int fec_ptp_get(struct net_device *ndev, struct ifreq *ifr); diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index 065a7616e961..f1224c2d112a 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -3312,6 +3312,7 @@ failed_register: failed_mii_init: failed_irq: failed_init: + fec_ptp_stop(pdev); if (fep->reg_phy) regulator_disable(fep->reg_phy); failed_regulator: @@ -3331,14 +3332,12 @@ fec_drv_remove(struct platform_device *pdev) struct net_device *ndev = platform_get_drvdata(pdev); struct fec_enet_private *fep = netdev_priv(ndev);

- cancel_delayed_work_sync(&fep->time_keep); cancel_work_sync(&fep->tx_timeout_work); + fec_ptp_stop(pdev); unregister_netdev(ndev); fec_enet_mii_remove(fep); if (fep->reg_phy) regulator_disable(fep->reg_phy); - if (fep->ptp_clock) - ptp_clock_unregister(fep->ptp_clock); fec_enet_clk_enable(ndev, false); of_node_put(fep->phy_node); free_netdev(ndev); diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index 992c8c3db553..9b2dcf4261a5 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -620,6 +620,16 @@ void fec_ptp_init(struct platform_device *pdev) schedule_delayed_work(&fep->time_keep, HZ); }

+void fec_ptp_stop(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct fec_enet_private *fep = netdev_priv(ndev); + + cancel_delayed_work_sync(&fep->time_keep); + if (fep->ptp_clock) + ptp_clock_unregister(fep->ptp_clock); +} + /** * fec_ptp_check_pps_event * @fep: the fec_enet_private structure handle