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Subject[PATCH] ACPI / dock: Use acpi_device_enumerated() to check if dock is present
Date
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

After commit 202317a573b2 (ACPI / scan: Add acpi_device objects for
all device nodes in the namespace) acpi_bus_get_device() will always
return 0 for dock devices in dock_notify(), so the dock station
docking code under ACPI_NOTIFY_DEVICE_CHECK will never be executed
and docking will not work as a result of that.

Fix the problem by making dock_notify() use acpi_device_enumerated()
to check the presence of the device instead of checking the return
value of acpi_bus_get_device().

Fixes: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

Hi All,

If I'm not mistaken, ACPI dock station docking is broken in 3.14-rc1 and this
patch should fix it.

Can anyone who happens to own a dock station with ACPI-based dock/undock
signaling verify this for me, please?

Rafael

---
drivers/acpi/dock.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-pm/drivers/acpi/dock.c
===================================================================
--- linux-pm.orig/drivers/acpi/dock.c
+++ linux-pm/drivers/acpi/dock.c
@@ -609,7 +609,7 @@ static int handle_eject_request(struct d
static void dock_notify(struct dock_station *ds, u32 event)
{
acpi_handle handle = ds->handle;
- struct acpi_device *ad;
+ struct acpi_device *adev = NULL;
int surprise_removal = 0;

/*
@@ -632,7 +632,8 @@ static void dock_notify(struct dock_stat
switch (event) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
- if (!dock_in_progress(ds) && acpi_bus_get_device(handle, &ad)) {
+ acpi_bus_get_device(handle, &adev);
+ if (!dock_in_progress(ds) && !acpi_device_enumerated(adev)) {
begin_dock(ds);
dock(ds);
if (!dock_present(ds)) {


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