/* * Copyright (C) 1997 Martin Mares * * Automatic IP Layer Configuration */ /* The following are initdata: */ extern int ic_proto_enabled; /* Protocols enabled (see IC_xxx) */ extern int ic_set_manually; /* IPconfig parameters set manually */ extern __be32 ic_myaddr; /* My IP address */ extern __be32 ic_gateway; /* Gateway IP address */ extern __be32 ic_servaddr; /* Boot server IP address */ extern __be32 root_server_addr; /* Address of NFS server */ extern u8 root_server_path[]; /* Path to mount as root */ /* bits in ic_proto_{enabled,used} */ #define IC_PROTO 0xFF /* Protocols mask: */ #define IC_BOOTP 0x01 /* BOOTP (or DHCP, see below) */ #define IC_RARP 0x02 /* RARP */ #define IC_USE_DHCP 0x100 /* If on, use DHCP instead of BOOTP */ it logo'/> index : net-next.git
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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 /sound/soc/codecs/wm8940.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 'sound/soc/codecs/wm8940.c')