# # DECnet configuration # config DECNET tristate "DECnet Support" ---help--- The DECnet networking protocol was used in many products made by Digital (now Compaq). It provides reliable stream and sequenced packet communications over which run a variety of services similar to those which run over TCP/IP. To find some tools to use with the kernel layer support, please look at Patrick Caulfield's web site: . More detailed documentation is available in . Be sure to say Y to "/proc file system support" and "Sysctl support" below when using DECnet, since you will need sysctl support to aid in configuration at run time. The DECnet code is also available as a module ( = code which can be inserted in and removed from the running kernel whenever you want). The module is called decnet. config DECNET_ROUTER bool "DECnet: router support" depends on DECNET select FIB_RULES ---help--- Add support for turning your DECnet Endnode into a level 1 or 2 router. This is an experimental, but functional option. If you do say Y here, then make sure that you also say Y to "Kernel/User network link driver", "Routing messages" and "Network packet filtering". The first two are required to allow configuration via rtnetlink (you will need Alexey Kuznetsov's iproute2 package from ). The "Network packet filtering" option will be required for the forthcoming routing daemon to work. See for more information. e'>summaryrefslogtreecommitdiff
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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/ax25/ax25_out.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/ax25/ax25_out.c')