/********************************************************************* * * Filename: ircomm_event.h * Version: * Description: * Status: Experimental. * Author: Dag Brattli * Created at: Sun Jun 6 23:51:13 1999 * Modified at: Thu Jun 10 08:36:25 1999 * Modified by: Dag Brattli * * Copyright (c) 1999 Dag Brattli, All Rights Reserved. * * 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. * * 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 . * ********************************************************************/ #ifndef IRCOMM_EVENT_H #define IRCOMM_EVENT_H #include typedef enum { IRCOMM_IDLE, IRCOMM_WAITI, IRCOMM_WAITR, IRCOMM_CONN, } IRCOMM_STATE; /* IrCOMM Events */ typedef enum { IRCOMM_CONNECT_REQUEST, IRCOMM_CONNECT_RESPONSE, IRCOMM_TTP_CONNECT_INDICATION, IRCOMM_LMP_CONNECT_INDICATION, IRCOMM_TTP_CONNECT_CONFIRM, IRCOMM_LMP_CONNECT_CONFIRM, IRCOMM_LMP_DISCONNECT_INDICATION, IRCOMM_TTP_DISCONNECT_INDICATION, IRCOMM_DISCONNECT_REQUEST, IRCOMM_TTP_DATA_INDICATION, IRCOMM_LMP_DATA_INDICATION, IRCOMM_DATA_REQUEST, IRCOMM_CONTROL_REQUEST, IRCOMM_CONTROL_INDICATION, } IRCOMM_EVENT; /* * Used for passing information through the state-machine */ struct ircomm_info { __u32 saddr; /* Source device address */ __u32 daddr; /* Destination device address */ __u8 dlsap_sel; LM_REASON reason; /* Reason for disconnect */ __u32 max_data_size; __u32 max_header_size; struct qos_info *qos; }; extern const char *const ircomm_state[]; struct ircomm_cb; /* Forward decl. */ int ircomm_do_event(struct ircomm_cb *self, IRCOMM_EVENT event, struct sk_buff *skb, struct ircomm_info *info); void ircomm_next_state(struct ircomm_cb *self, IRCOMM_STATE state); #endif >
path: root/net/ipv6/xfrm6_protocol.c
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authorBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
committerBjorn Helgaas <bhelgaas@google.com>2017-01-27 15:00:45 -0600
commit030305d69fc6963c16003f50d7e8d74b02d0a143 (patch)
tree363a4e34d199178769b7e7eeb26ea2620a55847b /net/ipv6/xfrm6_protocol.c
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 'net/ipv6/xfrm6_protocol.c')