/* * IEEE 802.1Q Multiple VLAN Registration Protocol (MVRP) * * Copyright (c) 2012 Massachusetts Institute of Technology * * Adapted from code in net/8021q/vlan_gvrp.c * Copyright (c) 2008 Patrick McHardy * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. */ #include #include #include #include #include "vlan.h" #define MRP_MVRP_ADDRESS { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x21 } enum mvrp_attributes { MVRP_ATTR_INVALID, MVRP_ATTR_VID, __MVRP_ATTR_MAX }; #define MVRP_ATTR_MAX (__MVRP_ATTR_MAX - 1) static struct mrp_application vlan_mrp_app __read_mostly = { .type = MRP_APPLICATION_MVRP, .maxattr = MVRP_ATTR_MAX, .pkttype.type = htons(ETH_P_MVRP), .group_address = MRP_MVRP_ADDRESS, .version = 0, }; int vlan_mvrp_request_join(const struct net_device *dev) { const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); __be16 vlan_id = htons(vlan->vlan_id); if (vlan->vlan_proto != htons(ETH_P_8021Q)) return 0; return mrp_request_join(vlan->real_dev, &vlan_mrp_app, &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID); } void vlan_mvrp_request_leave(const struct net_device *dev) { const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); __be16 vlan_id = htons(vlan->vlan_id); if (vlan->vlan_proto != htons(ETH_P_8021Q)) return; mrp_request_leave(vlan->real_dev, &vlan_mrp_app, &vlan_id, sizeof(vlan_id), MVRP_ATTR_VID); } int vlan_mvrp_init_applicant(struct net_device *dev) { return mrp_init_applicant(dev, &vlan_mrp_app); } void vlan_mvrp_uninit_applicant(struct net_device *dev) { mrp_uninit_applicant(dev, &vlan_mrp_app); } int __init vlan_mvrp_init(void) { return mrp_register_application(&vlan_mrp_app); } void vlan_mvrp_uninit(void) { mrp_unregister_application(&vlan_mrp_app); } nfig?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>commitdiff
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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/lapb/Kconfig
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/lapb/Kconfig')