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authorRajesh Shah <rajesh.shah@intel.com>2005-04-28 00:25:54 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2005-06-27 21:52:42 -0700
commit364d5094a43ff2ceff3d19e40c4199771cb6cb8f (patch)
treebc3c70c12895d22aaa96dc27632df22f4ff9ac9e /drivers
parent42f49a6ae5dca90cd0594475502bf1c43ff1dc07 (diff)
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[PATCH] acpi hotplug: clean up notify handlers on acpiphp unload
A root bridge may not have directly attached hotpluggable slots under it. Instead, it may have p2p bridges with slots under it. In this case, we need to clean up the p2p bridges and slots properly too. Patch below applies on top of the original patch, and fixes this problem. Without this, acpiphp leaves behind notify handlers on module unload, and subsequent module load attempts don't work properly too. Patch was tested on an ia64 Tiger4 box. Signed-off-by: Rajesh Shah <rajesh.shah@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c34
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 41c3eb28b69..2f72e50eca2 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -487,18 +487,12 @@ static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
return NULL;
}
-static void remove_bridge(acpi_handle handle)
+static void cleanup_bridge(struct acpiphp_bridge *bridge)
{
struct list_head *list, *tmp;
- struct acpiphp_bridge *bridge;
struct acpiphp_slot *slot;
acpi_status status;
-
- bridge = acpiphp_handle_to_bridge(handle);
- if (!bridge) {
- err("Could not find bridge for handle %p\n", handle);
- return;
- }
+ acpi_handle handle = bridge->handle;
status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
handle_hotplug_event_bridge);
@@ -529,6 +523,30 @@ static void remove_bridge(acpi_handle handle)
kfree(bridge);
}
+static acpi_status
+cleanup_p2p_bridge(acpi_handle handle, u32 lvl, void *context, void **rv)
+{
+ struct acpiphp_bridge *bridge;
+
+ if (!(bridge = acpiphp_handle_to_bridge(handle)))
+ return AE_OK;
+ cleanup_bridge(bridge);
+ return AE_OK;
+}
+
+static void remove_bridge(acpi_handle handle)
+{
+ struct acpiphp_bridge *bridge;
+
+ bridge = acpiphp_handle_to_bridge(handle);
+ if (bridge) {
+ cleanup_bridge(bridge);
+ } else {
+ /* clean-up p2p bridges under this host bridge */
+ acpi_walk_namespace(ACPI_TYPE_DEVICE, handle,
+ (u32)1, cleanup_p2p_bridge, NULL, NULL);
+ }
+}
static int power_on_slot(struct acpiphp_slot *slot)
{