/********************************************************************* * * Filename: ircomm_core.h * Version: * Description: * Status: Experimental. * Author: Dag Brattli * Created at: Wed Jun 9 08:58:43 1999 * Modified at: Mon Dec 13 11:52:29 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_CORE_H #define IRCOMM_CORE_H #include #include #include #define IRCOMM_MAGIC 0x98347298 #define IRCOMM_HEADER_SIZE 1 struct ircomm_cb; /* Forward decl. */ /* * A small call-table, so we don't have to check the service-type whenever * we want to do something */ typedef struct { int (*data_request)(struct ircomm_cb *, struct sk_buff *, int clen); int (*connect_request)(struct ircomm_cb *, struct sk_buff *, struct ircomm_info *); int (*connect_response)(struct ircomm_cb *, struct sk_buff *); int (*disconnect_request)(struct ircomm_cb *, struct sk_buff *, struct ircomm_info *); } call_t; struct ircomm_cb { irda_queue_t queue; magic_t magic; notify_t notify; call_t issue; int state; int line; /* Which TTY line we are using */ struct tsap_cb *tsap; struct lsap_cb *lsap; __u8 dlsap_sel; /* Destination LSAP/TSAP selector */ __u8 slsap_sel; /* Source LSAP/TSAP selector */ __u32 saddr; /* Source device address (link we are using) */ __u32 daddr; /* Destination device address */ int max_header_size; /* Header space we must reserve for each frame */ int max_data_size; /* The amount of data we can fill in each frame */ LOCAL_FLOW flow_status; /* Used by ircomm_lmp */ int pkt_count; /* Number of frames we have sent to IrLAP */ __u8 service_type; }; extern hashbin_t *ircomm; struct ircomm_cb *ircomm_open(notify_t *notify, __u8 service_type, int line); int ircomm_close(struct ircomm_cb *self); int ircomm_data_request(struct ircomm_cb *self, struct sk_buff *skb); void ircomm_data_indication(struct ircomm_cb *self, struct sk_buff *skb); void ircomm_process_data(struct ircomm_cb *self, struct sk_buff *skb); int ircomm_control_request(struct ircomm_cb *self, struct sk_buff *skb); int ircomm_connect_request(struct ircomm_cb *self, __u8 dlsap_sel, __u32 saddr, __u32 daddr, struct sk_buff *skb, __u8 service_type); void ircomm_connect_indication(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info); void ircomm_connect_confirm(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info); int ircomm_connect_response(struct ircomm_cb *self, struct sk_buff *userdata); int ircomm_disconnect_request(struct ircomm_cb *self, struct sk_buff *userdata); void ircomm_disconnect_indication(struct ircomm_cb *self, struct sk_buff *skb, struct ircomm_info *info); void ircomm_flow_request(struct ircomm_cb *self, LOCAL_FLOW flow); #define ircomm_is_connected(self) (self->state == IRCOMM_CONN) #endif space:mode:
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/wireless
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/wireless')