/* * USB of helper code * * 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. */ #include #include #include #include #include static const char *const usbphy_modes[] = { [USBPHY_INTERFACE_MODE_UNKNOWN] = "", [USBPHY_INTERFACE_MODE_UTMI] = "utmi", [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide", [USBPHY_INTERFACE_MODE_ULPI] = "ulpi", [USBPHY_INTERFACE_MODE_SERIAL] = "serial", [USBPHY_INTERFACE_MODE_HSIC] = "hsic", }; /** * of_usb_get_phy_mode - Get phy mode for given device_node * @np: Pointer to the given device_node * * The function gets phy interface string from property 'phy_type', * and returns the corresponding enum usb_phy_interface */ enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np) { const char *phy_type; int err, i; err = of_property_read_string(np, "phy_type", &phy_type); if (err < 0) return USBPHY_INTERFACE_MODE_UNKNOWN; for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) if (!strcmp(phy_type, usbphy_modes[i])) return i; return USBPHY_INTERFACE_MODE_UNKNOWN; } EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); pump-back'>packet-rx-pump-back net-next plumbingsTobias Klauser
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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/bcm
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/bcm')