/* * Ultra Wide Band * IE Received notification handling. * * Copyright (C) 2008 Cambridge Silicon Radio Ltd. * * 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. * * 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 . */ #include #include #include #include #include "uwb-internal.h" /* * Process an incoming IE Received notification. */ int uwbd_evt_handle_rc_ie_rcv(struct uwb_event *evt) { int result = -EINVAL; struct device *dev = &evt->rc->uwb_dev.dev; struct uwb_rc_evt_ie_rcv *iercv; /* Is there enough data to decode it? */ if (evt->notif.size < sizeof(*iercv)) { dev_err(dev, "IE Received notification: Not enough data to " "decode (%zu vs %zu bytes needed)\n", evt->notif.size, sizeof(*iercv)); goto error; } iercv = container_of(evt->notif.rceb, struct uwb_rc_evt_ie_rcv, rceb); dev_dbg(dev, "IE received, element ID=%d\n", iercv->IEData[0]); if (iercv->IEData[0] == UWB_RELINQUISH_REQUEST_IE) { dev_warn(dev, "unhandled Relinquish Request IE\n"); } return 0; error: return result; } r> summaryrefslogtreecommitdiff
path: root/drivers/usb/class/Kconfig
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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 /drivers/usb/class/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 'drivers/usb/class/Kconfig')