ACPI / dock: Initialize ACPI dock subsystem upfront
Commit 3b63aaa70e1 (PCI: acpiphp: Do not use ACPI PCI subdriver
mechanism) introduced an ACPI dock support regression, because it
changed the relative initialization order of the ACPI dock subsystem
and the ACPI-based PCI hotplug (acpiphp).
Namely, the ACPI dock subsystem has to be initialized before
acpiphp_enumerate_slots() is first run, which after commit
3b63aaa70e1 happens during the initial enumeration of the PCI
hierarchy triggered by the initial ACPI namespace scan in
acpi_scan_init(). For this reason, the dock subsystem has to be
initialized before the initial ACPI namespace scan in
acpi_scan_init().
To make that happen, modify the ACPI dock subsystem to be
non-modular and add the invocation of its initialization routine,
acpi_dock_init(), to acpi_scan_init() directly before the initial
namespace scan.
[rjw: Changelog, removal of dock_exit().]
References: https://bugzilla.kernel.org/show_bug.cgi?id=59501
Reported-and-tested-by: Alexander E. Patrakov <patrakov@gmail.com>
Tested-by: Illya Klymov <xanf@xanf.me>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: 3.9+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index 297cbf4..c610a76 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -40,6 +40,11 @@
#else
static inline void acpi_container_init(void) {}
#endif
+#ifdef CONFIG_ACPI_DOCK
+void acpi_dock_init(void);
+#else
+static inline void acpi_dock_init(void) {}
+#endif
#ifdef CONFIG_ACPI_HOTPLUG_MEMORY
void acpi_memory_hotplug_init(void);
#else