If we can discover devices using PNP, we can skip some legacy probes.
This flag ("pnp_platform_devices") indicates that PNPBIOS or PNPACPI
is enabled and should tell us about builtin devices.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@xxxxxx>
Index: work/drivers/pnp/core.c
===================================================================
--- work.orig/drivers/pnp/core.c 2007-03-27 13:05:23.000000000 -0600
+++ work/drivers/pnp/core.c 2007-03-27 16:12:54.000000000 -0600
@@ -23,6 +23,14 @@
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;
Index: work/drivers/pnp/pnpacpi/core.c
===================================================================
--- work.orig/drivers/pnp/pnpacpi/core.c 2007-03-27 13:05:23.000000000 -0600
+++ work/drivers/pnp/pnpacpi/core.c 2007-03-27 14:44:05.000000000 -0600
@@ -247,6 +247,7 @@
pnp_register_protocol(&pnpacpi_protocol);
acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
pnp_info("PnP ACPI: found %d devices", num);
+ pnp_platform_devices = 1;
return 0;
}
subsys_initcall(pnpacpi_init);
Index: work/drivers/pnp/pnpbios/core.c
===================================================================
--- work.orig/drivers/pnp/pnpbios/core.c 2007-03-27 13:05:23.000000000 -0600
+++ work/drivers/pnp/pnpbios/core.c 2007-03-27 14:44:05.000000000 -0600
@@ -574,6 +574,7 @@
/* scan for pnpbios devices */
build_devlist();
+ pnp_platform_devices = 1;
return 0;
}
Index: work/include/linux/pnp.h
===================================================================
--- work.orig/include/linux/pnp.h 2007-03-27 13:05:23.000000000 -0600
+++ work/include/linux/pnp.h 2007-03-27 14:44:05.000000000 -0600
@@ -364,6 +364,7 @@
int pnp_device_attach(struct pnp_dev *pnp_dev);
void pnp_device_detach(struct pnp_dev *pnp_dev);
extern struct list_head pnp_global;
+extern int pnp_platform_devices;
/* multidevice card support */
int pnp_add_card(struct pnp_card *card);
@@ -411,6 +412,7 @@
static inline int pnp_add_device(struct pnp_dev *dev) { return -ENODEV; }
static inline int pnp_device_attach(struct pnp_dev *pnp_dev) { return -ENODEV; }
static inline void pnp_device_detach(struct pnp_dev *pnp_dev) { ; }
+#define pnp_platform_devices 0
/* multidevice card support */
static inline int pnp_add_card(struct pnp_card *card) { return -ENODEV; }
--
-
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
