#ifndef __WATCHDOG_PRETIMEOUT_H #define __WATCHDOG_PRETIMEOUT_H #define WATCHDOG_GOV_NAME_MAXLEN 20 struct watchdog_device; struct watchdog_governor { const char name[WATCHDOG_GOV_NAME_MAXLEN]; void (*pretimeout)(struct watchdog_device *wdd); }; #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_GOV) /* Interfaces to watchdog pretimeout governors */ int watchdog_register_governor(struct watchdog_governor *gov); void watchdog_unregister_governor(struct watchdog_governor *gov); /* Interfaces to watchdog_dev.c */ int watchdog_register_pretimeout(struct watchdog_device *wdd); void watchdog_unregister_pretimeout(struct watchdog_device *wdd); int watchdog_pretimeout_available_governors_get(char *buf); int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf); int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, const char *buf); #if IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_NOOP) #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "noop" #elif IS_ENABLED(CONFIG_WATCHDOG_PRETIMEOUT_DEFAULT_GOV_PANIC) #define WATCHDOG_PRETIMEOUT_DEFAULT_GOV "panic" #endif #else static inline int watchdog_register_pretimeout(struct watchdog_device *wdd) { return 0; } static inline void watchdog_unregister_pretimeout(struct watchdog_device *wdd) { } static inline int watchdog_pretimeout_available_governors_get(char *buf) { return -EINVAL; } static inline int watchdog_pretimeout_governor_get(struct watchdog_device *wdd, char *buf) { return -EINVAL; } static inline int watchdog_pretimeout_governor_set(struct watchdog_device *wdd, const char *buf) { return -EINVAL; } #endif #endif nux/net-next.git/refs/?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>refslogtreecommitdiff
path: root/include/dt-bindings/reset/tegra186-reset.h
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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 /include/dt-bindings/reset/tegra186-reset.h
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 'include/dt-bindings/reset/tegra186-reset.h')