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-rw-r--r--drivers/pnp/core.c8
-rw-r--r--drivers/pnp/pnpacpi/core.c1
-rw-r--r--drivers/pnp/pnpbios/core.c1
3 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c
index d8d75541552..3e20b1cc777 100644
--- a/drivers/pnp/core.c
+++ b/drivers/pnp/core.c
@@ -23,6 +23,14 @@ static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
DEFINE_SPINLOCK(pnp_lock);
+/*
+ * ACPI or PNPBIOS should tell us about all platform devices, so we can
+ * skip some blind probes. ISAPNP typically enumerates only plug-in ISA
+ * devices, not built-in things like COM ports.
+ */
+int pnp_platform_devices;
+EXPORT_SYMBOL(pnp_platform_devices);
+
void *pnp_alloc(long size)
{
void *result;
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index 7eb8275185b..a00548799e9 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -285,6 +285,7 @@ static int __init pnpacpi_init(void)
acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
pnp_info("PnP ACPI: found %d devices", num);
unregister_acpi_bus_type(&acpi_pnp_bus);
+ pnp_platform_devices = 1;
return 0;
}
subsys_initcall(pnpacpi_init);
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
index b71aff21b3f..3a201b77b96 100644
--- a/drivers/pnp/pnpbios/core.c
+++ b/drivers/pnp/pnpbios/core.c
@@ -570,6 +570,7 @@ static int __init pnpbios_init(void)
/* scan for pnpbios devices */
build_devlist();
+ pnp_platform_devices = 1;
return 0;
}