#
# CAIF net configurations
#
menuconfig CAIF
tristate "CAIF support"
select CRC_CCITT
default n
---help---
The "Communication CPU to Application CPU Interface" (CAIF) is a packet
based connection-oriented MUX protocol developed by ST-Ericsson for use
with its modems. It is accessed from user space as sockets (PF_CAIF).
Say Y (or M) here if you build for a phone product (e.g. Android or
MeeGo ) that uses CAIF as transport, if unsure say N.
If you select to build it as module then CAIF_NETDEV also needs to be
built as modules. You will also need to say yes to any CAIF physical
devices that your platform requires.
See Documentation/networking/caif for a further explanation on how to
use and configure CAIF.
config CAIF_DEBUG
bool "Enable Debug"
depends on CAIF
default n
---help---
Enable the inclusion of debug code in the CAIF stack.
Be aware that doing this will impact performance.
If unsure say N.
config CAIF_NETDEV
tristate "CAIF GPRS Network device"
depends on CAIF
default CAIF
---help---
Say Y if you will be using a CAIF based GPRS network device.
This can be either built-in or a loadable module,
If you select to build it as a built-in then the main CAIF device must
also be a built-in.
If unsure say Y.
config CAIF_USB
tristate "CAIF USB support"
depends on CAIF
default n
---help---
Say Y if you are using CAIF over USB CDC NCM.
This can be either built-in or a loadable module,
If you select to build it as a built-in then the main CAIF device must
also be a built-in.
If unsure say N.
le class='tabs'>
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+