On Sun, Jan 20, 2013 at 3:00 PM, Rafael J. Wysocki <r...@sisk.pl> wrote:
> On Thursday, January 17, 2013 11:53:19 PM Yinghai Lu wrote:
>> From: Tang Chen <tangc...@cn.fujitsu.com>
>>
>> acpi_install_notify_handler() could fail. So check the exit status
>> and give a better debug info.
>>
>> Signed-off-by: Tang Chen <tangc...@cn.fujitsu.com>
>> Signed-off-by: Yinghai Lu <ying...@kernel.org>
>> ---
>> drivers/acpi/pci_root.c | 12 +++++++++---
>> 1 file changed, 9 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
>> index 3ce5d80..f3ceb61 100644
>> --- a/drivers/acpi/pci_root.c
>> +++ b/drivers/acpi/pci_root.c
>> @@ -762,6 +762,7 @@ 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 };
>> @@ -774,9 +775,14 @@ 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",
>
> Can you break that line, please? And use pr_debug()?
Long line should be ok, and checkpatch.pl is not complaining about that.
Also keep the complete print out in one line, could make git grep find
that code exactly.
Actually I really hate pr_debug(), that will make the generated code
different with DEBUG
defined or not. And need to end user to recompile kernel to get debug
output if needed.
Thanks
Yinghai
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