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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596// SPDX-License-Identifier: GPL-2.0-or-later/* * This file contains all networking devres helpers. */
#include <linux/device.h>#include <linux/etherdevice.h>#include <linux/netdevice.h>
struct net_device_devres { struct net_device *ndev;};
static void devm_free_netdev(struct device *dev, void *this){ struct net_device_devres *res = this;
free_netdev(res->ndev);}
struct net_device *devm_alloc_etherdev_mqs(struct device *dev, int sizeof_priv, unsigned int txqs, unsigned int rxqs){ struct net_device_devres *dr;
dr = devres_alloc(devm_free_netdev, sizeof(*dr), GFP_KERNEL); if (!dr) return NULL;
dr->ndev = alloc_etherdev_mqs(sizeof_priv, txqs, rxqs); if (!dr->ndev) { devres_free(dr); return NULL; }
devres_add(dev, dr);
return dr->ndev;}EXPORT_SYMBOL(devm_alloc_etherdev_mqs);
static void devm_unregister_netdev(struct device *dev, void *this){ struct net_device_devres *res = this;
unregister_netdev(res->ndev);}
static int netdev_devres_match(struct device *dev, void *this, void *match_data){ struct net_device_devres *res = this; struct net_device *ndev = match_data;
return ndev == res->ndev;}
/** * devm_register_netdev - resource managed variant of register_netdev() * @dev: managing device for this netdev - usually the parent device * @ndev: device to register * * This is a devres variant of register_netdev() for which the unregister * function will be called automatically when the managing device is * detached. Note: the net_device used must also be resource managed by * the same struct device. */int devm_register_netdev(struct device *dev, struct net_device *ndev){ struct net_device_devres *dr; int ret;
/* struct net_device must itself be managed. For now a managed netdev * can only be allocated by devm_alloc_etherdev_mqs() so the check is * straightforward. */ if (WARN_ON(!devres_find(dev, devm_free_netdev, netdev_devres_match, ndev))) return -EINVAL;
dr = devres_alloc(devm_unregister_netdev, sizeof(*dr), GFP_KERNEL); if (!dr) return -ENOMEM;
ret = register_netdev(ndev); if (ret) { devres_free(dr); return ret; }
dr->ndev = ndev; devres_add(ndev->dev.parent, dr);
return 0;}EXPORT_SYMBOL(devm_register_netdev);