/* * Link Layer Control manager * * Copyright (C) 2012 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include #include "llc.h" static LIST_HEAD(llc_engines); int nfc_llc_init(void) { int r; r = nfc_llc_nop_register(); if (r) goto exit; r = nfc_llc_shdlc_register(); if (r) goto exit; return 0; exit: nfc_llc_exit(); return r; } void nfc_llc_exit(void) { struct nfc_llc_engine *llc_engine, *n; list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) { list_del(&llc_engine->entry); kfree(llc_engine->name); kfree(llc_engine); } } int nfc_llc_register(const char *name, struct nfc_llc_ops *ops) { struct nfc_llc_engine *llc_engine; llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL); if (llc_engine == NULL) return -ENOMEM; llc_engine->name = kstrdup(name, GFP_KERNEL); if (llc_engine->name == NULL) { kfree(llc_engine); return -ENOMEM; } llc_engine->ops = ops; INIT_LIST_HEAD(&llc_engine->entry); list_add_tail(&llc_engine->entry, &llc_engines); return 0; } static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name) { struct nfc_llc_engine *llc_engine; list_for_each_entry(llc_engine, &llc_engines, entry) { if (strcmp(llc_engine->name, name) == 0) return llc_engine; } return NULL; } void nfc_llc_unregister(const char *name) { struct nfc_llc_engine *llc_engine; llc_engine = nfc_llc_name_to_engine(name); if (llc_engine == NULL) return; list_del(&llc_engine->entry); kfree(llc_engine->name); kfree(llc_engine); } struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv, rcv_to_hci_t rcv_to_hci, int tx_headroom, int tx_tailroom, llc_failure_t llc_failure) { struct nfc_llc_engine *llc_engine; struct nfc_llc *llc; llc_engine = nfc_llc_name_to_engine(name); if (llc_engine == NULL) return NULL; llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL); if (llc == NULL) return NULL; llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci, tx_headroom, tx_tailroom, &llc->rx_headroom, &llc->rx_tailroom, llc_failure); if (llc->data == NULL) { kfree(llc); return NULL; } llc->ops = llc_engine->ops; return llc; } void nfc_llc_free(struct nfc_llc *llc) { llc->ops->deinit(llc); kfree(llc); } int nfc_llc_start(struct nfc_llc *llc) { return llc->ops->start(llc); } EXPORT_SYMBOL(nfc_llc_start); int nfc_llc_stop(struct nfc_llc *llc) { return llc->ops->stop(llc); } EXPORT_SYMBOL(nfc_llc_stop); void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) { llc->ops->rcv_from_drv(llc, skb); } int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) { return llc->ops->xmit_from_hci(llc, skb); } void *nfc_llc_get_data(struct nfc_llc *llc) { return llc->data; } fa5a5ab440de0a94d9ad8b3ce2d0'>net
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /include/dt-bindings/net
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'include/dt-bindings/net')