From: Sean Anderson sean.anderson@seco.com
[ Upstream commit b7cbc6740bd6ad5d43345a2504f7e4beff0d709f ]
When the mac device gets removed, it leaves behind the ethernet device. This will result in a segfault next time the ethernet device accesses mac_dev. Remove the ethernet device when we get removed to prevent this. This is not completely reversible, since some resources aren't cleaned up properly, but that can be addressed later.
Fixes: 3933961682a3 ("fsl/fman: Add FMan MAC driver") Signed-off-by: Sean Anderson sean.anderson@seco.com Link: https://lore.kernel.org/r/20221103182831.2248833-1-sean.anderson@seco.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/freescale/fman/mac.c | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/net/ethernet/freescale/fman/mac.c b/drivers/net/ethernet/freescale/fman/mac.c index 713abcd9371f..390849faf4cd 100644 --- a/drivers/net/ethernet/freescale/fman/mac.c +++ b/drivers/net/ethernet/freescale/fman/mac.c @@ -891,12 +891,21 @@ static int mac_probe(struct platform_device *_of_dev) return err; }
+static int mac_remove(struct platform_device *pdev) +{ + struct mac_device *mac_dev = platform_get_drvdata(pdev); + + platform_device_unregister(mac_dev->priv->eth_dev); + return 0; +} + static struct platform_driver mac_driver = { .driver = { .name = KBUILD_MODNAME, .of_match_table = mac_match, }, .probe = mac_probe, + .remove = mac_remove, };
builtin_platform_driver(mac_driver);