/* * Copyright (C) 2013 Daniel Tang * * 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. * * Based off drivers/usb/chipidea/ci_hdrc_msm.c * */ #include #include #include #include #include "ci.h" static struct ci_hdrc_platform_data ci_hdrc_zevio_platdata = { .name = "ci_hdrc_zevio", .flags = CI_HDRC_REGS_SHARED | CI_HDRC_FORCE_FULLSPEED, .capoffset = DEF_CAPOFFSET, }; static int ci_hdrc_zevio_probe(struct platform_device *pdev) { struct platform_device *ci_pdev; dev_dbg(&pdev->dev, "ci_hdrc_zevio_probe\n"); ci_pdev = ci_hdrc_add_device(&pdev->dev, pdev->resource, pdev->num_resources, &ci_hdrc_zevio_platdata); if (IS_ERR(ci_pdev)) { dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n"); return PTR_ERR(ci_pdev); } platform_set_drvdata(pdev, ci_pdev); return 0; } static int ci_hdrc_zevio_remove(struct platform_device *pdev) { struct platform_device *ci_pdev = platform_get_drvdata(pdev); ci_hdrc_remove_device(ci_pdev); return 0; } static const struct of_device_id ci_hdrc_zevio_dt_ids[] = { { .compatible = "lsi,zevio-usb", }, { /* sentinel */ } }; static struct platform_driver ci_hdrc_zevio_driver = { .probe = ci_hdrc_zevio_probe, .remove = ci_hdrc_zevio_remove, .driver = { .name = "zevio_usb", .of_match_table = ci_hdrc_zevio_dt_ids, }, }; MODULE_DEVICE_TABLE(of, ci_hdrc_zevio_dt_ids); module_platform_driver(ci_hdrc_zevio_driver); MODULE_LICENSE("GPL v2"); a>logtreecommitdiff
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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/bridge/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 'net/bridge/Kconfig')