#ifndef __PERF_CONFIG_H #define __PERF_CONFIG_H #include #include struct perf_config_item { char *name; char *value; bool from_system_config; struct list_head node; }; struct perf_config_section { char *name; struct list_head items; bool from_system_config; struct list_head node; }; struct perf_config_set { struct list_head sections; }; extern const char *config_exclusive_filename; typedef int (*config_fn_t)(const char *, const char *, void *); int perf_default_config(const char *, const char *, void *); int perf_config(config_fn_t fn, void *); int perf_config_int(const char *, const char *); u64 perf_config_u64(const char *, const char *); int perf_config_bool(const char *, const char *); int config_error_nonbool(const char *); const char *perf_etc_perfconfig(void); struct perf_config_set *perf_config_set__new(void); void perf_config_set__delete(struct perf_config_set *set); int perf_config_set__collect(struct perf_config_set *set, const char *file_name, const char *var, const char *value); void perf_config__init(void); void perf_config__exit(void); void perf_config__refresh(void); /** * perf_config_sections__for_each - iterate thru all the sections * @list: list_head instance to iterate * @section: struct perf_config_section iterator */ #define perf_config_sections__for_each_entry(list, section) \ list_for_each_entry(section, list, node) /** * perf_config_items__for_each - iterate thru all the items * @list: list_head instance to iterate * @item: struct perf_config_item iterator */ #define perf_config_items__for_each_entry(list, item) \ list_for_each_entry(item, list, node) /** * perf_config_set__for_each - iterate thru all the config section-item pairs * @set: evlist instance to iterate * @section: struct perf_config_section iterator * @item: struct perf_config_item iterator */ #define perf_config_set__for_each_entry(set, section, item) \ perf_config_sections__for_each_entry(&set->sections, section) \ perf_config_items__for_each_entry(§ion->items, item) #endif /* __PERF_CONFIG_H */ private-remove&id=030305d69fc6963c16003f50d7e8d74b02d0a143'>commitdiff
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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 /tools/perf/perf-archive.sh
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 'tools/perf/perf-archive.sh')