diff options
| author | Abin Joseph <abin.joseph@amd.com> | 2025-06-10 17:11:11 +0530 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-06-11 17:39:56 -0700 |
| commit | 5e84d5b36b5b0e8552fbbdfbfd9c81bb79ab0947 (patch) | |
| tree | a2411aa2d00a23ccdbe6662b58630adb8649eefb | |
| parent | 48c15e974c7d85a772792e56daf46c2b28190ec7 (diff) | |
net: macb: Add shutdown operation support
Implement the shutdown hook to ensure clean and complete deactivation of
MACB controller. The shutdown sequence is protected with 'rtnl_lock()'
to serialize access and prevent race conditions while detaching and
closing the network device. This ensure a safe transition when the Kexec
utility calls the shutdown hook, facilitating seamless loading and
booting of a new kernel from the currently running one.
Signed-off-by: Abin Joseph <abin.joseph@amd.com>
Link: https://patch.msgid.link/20250610114111.1708614-1-abin.joseph@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/cadence/macb_main.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c index d1f1ae5ea161..53aaf6b08e39 100644 --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -5654,6 +5654,20 @@ static int __maybe_unused macb_runtime_resume(struct device *dev) return 0; } +static void macb_shutdown(struct platform_device *pdev) +{ + struct net_device *netdev = platform_get_drvdata(pdev); + + rtnl_lock(); + + if (netif_running(netdev)) + dev_close(netdev); + + netif_device_detach(netdev); + + rtnl_unlock(); +} + static const struct dev_pm_ops macb_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(macb_suspend, macb_resume) SET_RUNTIME_PM_OPS(macb_runtime_suspend, macb_runtime_resume, NULL) @@ -5667,6 +5681,7 @@ static struct platform_driver macb_driver = { .of_match_table = of_match_ptr(macb_dt_ids), .pm = &macb_pm_ops, }, + .shutdown = macb_shutdown, }; module_platform_driver(macb_driver); |