/* * PCM179X ASoC SPI driver * * Copyright (c) Amarula Solutions B.V. 2013 * * Michael Trimarchi * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * 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. */ #include #include #include #include #include "pcm179x.h" static int pcm179x_spi_probe(struct spi_device *spi) { struct regmap *regmap; int ret; regmap = devm_regmap_init_spi(spi, &pcm179x_regmap_config); if (IS_ERR(regmap)) { ret = PTR_ERR(regmap); dev_err(&spi->dev, "Failed to allocate regmap: %d\n", ret); return ret; } return pcm179x_common_init(&spi->dev, regmap); } static int pcm179x_spi_remove(struct spi_device *spi) { return pcm179x_common_exit(&spi->dev); } static const struct of_device_id pcm179x_of_match[] = { { .compatible = "ti,pcm1792a", }, { } }; MODULE_DEVICE_TABLE(of, pcm179x_of_match); static const struct spi_device_id pcm179x_spi_ids[] = { { "pcm179x", 0 }, { }, }; MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids); static struct spi_driver pcm179x_spi_driver = { .driver = { .name = "pcm179x", .of_match_table = of_match_ptr(pcm179x_of_match), }, .id_table = pcm179x_spi_ids, .probe = pcm179x_spi_probe, .remove = pcm179x_spi_remove, }; module_spi_driver(pcm179x_spi_driver); MODULE_DESCRIPTION("ASoC PCM179X SPI driver"); MODULE_AUTHOR("Michael Trimarchi "); MODULE_LICENSE("GPL"); ove'>logtreecommitdiff
path: root/net/mac80211/debugfs_netdev.c
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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/mac80211/debugfs_netdev.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/mac80211/debugfs_netdev.c')