diff options
| author | Tang Chen <tangchen@cn.fujitsu.com> | 2013-01-22 01:20:49 +0400 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2013-01-26 01:51:47 +0400 |
| commit | 121b090e7d4063b65f40c267ef0fb34fb278dfdf (patch) | |
| tree | 3e2d276c97141256afb99cea2519edc1c4d678a5 /drivers/acpi/pci_root.c | |
| parent | 668192b678201d2fff27c6cc76bb003c1ec4a52a (diff) | |
| download | linux-121b090e7d4063b65f40c267ef0fb34fb278dfdf.tar.xz | |
PCI/ACPI: Print info if host bridge notify handler installation fails
acpi_install_notify_handler() could fail. So check the exit status
and give a better debug info.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index 1389811aa21b..fd59f57d3829 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -769,6 +769,7 @@ static void handle_hotplug_event_root(acpi_handle handle, u32 type, static acpi_status __init find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) { + acpi_status status; char objname[64]; struct acpi_buffer buffer = { .length = sizeof(objname), .pointer = objname }; @@ -781,9 +782,14 @@ find_root_bridges(acpi_handle handle, u32 lvl, void *context, void **rv) acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); - acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - handle_hotplug_event_root, NULL); - printk(KERN_DEBUG "acpi root: %s notify handler installed\n", objname); + status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, + handle_hotplug_event_root, NULL); + if (ACPI_FAILURE(status)) + printk(KERN_DEBUG "acpi root: %s notify handler is not installed, exit status: %u\n", + objname, (unsigned int)status); + else + printk(KERN_DEBUG "acpi root: %s notify handler is installed\n", + objname); return AE_OK; } |