From: Sean Anderson <sean.anderson@xxxxxxxx>
[ 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@xxxxxxxx>
Link: https://lore.kernel.org/r/20221103182831.2248833-1-sean.anderson@xxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 93b7ed361b82..dca6fd114bb5 100644
--- a/drivers/net/ethernet/freescale/fman/mac.c
+++ b/drivers/net/ethernet/freescale/fman/mac.c
@@ -953,12 +953,21 @@ 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);
--
2.35.1
