/********************************************************************* * * Filename: irmod.c * Version: 0.9 * Description: IrDA stack main entry points * Status: Experimental. * Author: Dag Brattli * Created at: Mon Dec 15 13:55:39 1997 * Modified at: Wed Jan 5 15:12:41 2000 * Modified by: Dag Brattli * * Copyright (c) 1997, 1999-2000 Dag Brattli, All Rights Reserved. * Copyright (c) 2000-2004 Jean Tourrilhes * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * Neither Dag Brattli nor University of Tromsø admit liability nor * provide warranty for any of this software. This material is * provided "AS-IS" and at no charge. * ********************************************************************/ /* * This file contains the main entry points of the IrDA stack. * They are in this file and not af_irda.c because some developpers * are using the IrDA stack without the socket API (compiling out * af_irda.c). * Jean II */ #include #include #include #include /* notify_t */ #include /* irlap_init */ #include /* irlmp_init */ #include /* iriap_init */ #include /* irttp_init */ #include /* irda_device_init */ /* Packet type handler. * Tell the kernel how IrDA packets should be handled. */ static struct packet_type irda_packet_type __read_mostly = { .type = cpu_to_be16(ETH_P_IRDA), .func = irlap_driver_rcv, /* Packet type handler irlap_frame.c */ }; /* * Function irda_notify_init (notify) * * Used for initializing the notify structure * */ void irda_notify_init(notify_t *notify) { notify->data_indication = NULL; notify->udata_indication = NULL; notify->connect_confirm = NULL; notify->connect_indication = NULL; notify->disconnect_indication = NULL; notify->flow_indication = NULL; notify->status_indication = NULL; notify->instance = NULL; strlcpy(notify->name, "Unknown", sizeof(notify->name)); } EXPORT_SYMBOL(irda_notify_init); /* * Function irda_init (void) * * Protocol stack initialisation entry point. * Initialise the various components of the IrDA stack */ static int __init irda_init(void) { int ret = 0; /* Lower layer of the stack */ irlmp_init(); irlap_init(); /* Driver/dongle support */ irda_device_init(); /* Higher layers of the stack */ iriap_init(); irttp_init(); ret = irsock_init(); if (ret < 0) goto out_err_1; /* Add IrDA packet type (Start receiving packets) */ dev_add_pack(&irda_packet_type); /* External APIs */ #ifdef CONFIG_PROC_FS irda_proc_register(); #endif #ifdef CONFIG_SYSCTL ret = irda_sysctl_register(); if (ret < 0) goto out_err_2; #endif ret = irda_nl_register(); if (ret < 0) goto out_err_3; return 0; out_err_3: #ifdef CONFIG_SYSCTL irda_sysctl_unregister(); out_err_2: #endif #ifdef CONFIG_PROC_FS irda_proc_unregister(); #endif /* Remove IrDA packet type (stop receiving packets) */ dev_remove_pack(&irda_packet_type); /* Remove higher layers */ irsock_cleanup(); out_err_1: irttp_cleanup(); iriap_cleanup(); /* Remove lower layers */ irda_device_cleanup(); irlap_cleanup(); /* Must be done before irlmp_cleanup()! DB */ /* Remove middle layer */ irlmp_cleanup(); return ret; } /* * Function irda_cleanup (void) * * Protocol stack cleanup/removal entry point. * Cleanup the various components of the IrDA stack */ static void __exit irda_cleanup(void) { /* Remove External APIs */ irda_nl_unregister(); #ifdef CONFIG_SYSCTL irda_sysctl_unregister(); #endif #ifdef CONFIG_PROC_FS irda_proc_unregister(); #endif /* Remove IrDA packet type (stop receiving packets) */ dev_remove_pack(&irda_packet_type); /* Remove higher layers */ irsock_cleanup(); irttp_cleanup(); iriap_cleanup(); /* Remove lower layers */ irda_device_cleanup(); irlap_cleanup(); /* Must be done before irlmp_cleanup()! DB */ /* Remove middle layer */ irlmp_cleanup(); } /* * The IrDA stack must be initialised *before* drivers get initialised, * and *before* higher protocols (IrLAN/IrCOMM/IrNET) get initialised, * otherwise bad things will happen (hashbins will be NULL for example). * Those modules are at module_init()/device_initcall() level. * * On the other hand, it needs to be initialised *after* the basic * networking, the /proc/net filesystem and sysctl module. Those are * currently initialised in .../init/main.c (before initcalls). * Also, IrDA drivers needs to be initialised *after* the random number * generator (main stack and higher layer init don't need it anymore). * * Jean II */ subsys_initcall(irda_init); module_exit(irda_cleanup); MODULE_AUTHOR("Dag Brattli & Jean Tourrilhes "); MODULE_DESCRIPTION("The Linux IrDA Protocol Stack"); MODULE_LICENSE("GPL"); MODULE_ALIAS_NETPROTO(PF_IRDA); d=030305d69fc6963c16003f50d7e8d74b02d0a143'>patch) tree363a4e34d199178769b7e7eeb26ea2620a55847b /drivers/usb/host/sl811.h parent4d191b1b63c209e37bf27938ef365244d3c41084 (diff)
PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
In a struct pcie_link_state, link->root points to the pcie_link_state of the root of the PCIe hierarchy. For the topmost link, this points to itself (link->root = link). For others, we copy the pointer from the parent (link->root = link->parent->root). Previously we recognized that Root Ports originated PCIe hierarchies, but we treated PCI/PCI-X to PCIe Bridges as being in the middle of the hierarchy, and when we tried to copy the pointer from link->parent->root, there was no parent, and we dereferenced a NULL pointer: BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 IP: [<ffffffff9e424350>] pcie_aspm_init_link_state+0x170/0x820 Recognize that PCI/PCI-X to PCIe Bridges originate PCIe hierarchies just like Root Ports do, so link->root for these devices should also point to itself. Fixes: 51ebfc92b72b ("PCI: Enumerate switches below PCI-to-PCIe bridges") Link: https://bugzilla.kernel.org/show_bug.cgi?id=193411 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1022181 Tested-by: lists@ssl-mail.com Tested-by: Jayachandran C. <jnair@caviumnetworks.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> CC: stable@vger.kernel.org # v4.2+
Diffstat (limited to 'drivers/usb/host/sl811.h')