PNP: add pnp_possible_config() -- can a device could be configured this way?
As part of a heuristic to identify modem devices, 8250_pnp.c
checks to see whether a device can be configured at any of the
legacy COM port addresses.
This patch moves the code that traverses the PNP "possible resource
options" from 8250_pnp.c to the PNP subsystem. This encapsulation
is important because a future patch will change the implementation
of those resource options.
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/serial/8250_pnp.c b/drivers/serial/8250_pnp.c
index 97c68d02..638b686 100644
--- a/drivers/serial/8250_pnp.c
+++ b/drivers/serial/8250_pnp.c
@@ -383,21 +383,14 @@
return 0;
}
-static int __devinit check_resources(struct pnp_option *option)
+static int __devinit check_resources(struct pnp_dev *dev)
{
- struct pnp_option *tmp;
- if (!option)
- return 0;
+ resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8};
+ int i;
- for (tmp = option; tmp; tmp = tmp->next) {
- struct pnp_port *port;
- for (port = tmp->port; port; port = port->next)
- if ((port->size == 8) &&
- ((port->min == 0x2f8) ||
- (port->min == 0x3f8) ||
- (port->min == 0x2e8) ||
- (port->min == 0x3e8)))
- return 1;
+ for (i = 0; i < ARRAY_SIZE(base); i++) {
+ if (pnp_possible_config(dev, IORESOURCE_IO, base[i], 8))
+ return 1;
}
return 0;
@@ -420,10 +413,7 @@
(dev->card && check_name(dev->card->name))))
return -ENODEV;
- if (check_resources(dev->independent))
- return 0;
-
- if (check_resources(dev->dependent))
+ if (check_resources(dev))
return 0;
return -ENODEV;