lkml.org 
[lkml]   [2012]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] Check exit status of acpi_install_notify_handler() in find_root_bridges().
Date
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>
---
drivers/acpi/pci_root_hp.c | 12 +++++++++---
1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/acpi/pci_root_hp.c b/drivers/acpi/pci_root_hp.c
index 05a88ae..1985749 100644
--- a/drivers/acpi/pci_root_hp.c
+++ b/drivers/acpi/pci_root_hp.c
@@ -246,6 +246,7 @@ 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 };
@@ -258,9 +259,14 @@ 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 not installed\n"
+ "acpi root: exit status: %u\n",
+ objname, (unsigned int)status);
+ else
+ printk(KERN_DEBUG "acpi root: %s notify handler installed\n", objname);

add_acpi_root_bridge(handle);

--
1.7.1


\
 
 \ /
  Last update: 2012-10-12 13:21    [W:0.045 / U:0.092 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site