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PNPACPI: cope with invalid device IDs

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If primary ID (HID) is invalid try locating first valid ID on compatible
ID list before giving up.

This helps, for example, to recognize i8042 AUX port on Sony Vaio VPCZ1
which uses SNYSYN0003 as HID. Without the patch users are forced to
boot with i8042.nopnp to make use of their touchpads.

Tested-by: Jan-Hendrik Zab <jan@jhz.name>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Dmitry Torokhov 2010-09-18 10:11:09 -07:00 committed by Len Brown
parent 899611ee7d
commit 420a0f6637
1 changed files with 24 additions and 5 deletions
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29
drivers/pnp/pnpacpi/core.c
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@ -28,7 +28,7 @@
#include "../base.h"
#include "pnpacpi.h"
static int num = 0;
static int num;
/* We need only to blacklist devices that have already an acpi driver that
* can't use pnp layer. We don't need to blacklist device that are directly
@ -180,11 +180,24 @@ struct pnp_protocol pnpacpi_protocol = {
};
EXPORT_SYMBOL(pnpacpi_protocol);
static char *pnpacpi_get_id(struct acpi_device *device)
{
struct acpi_hardware_id *id;
list_for_each_entry(id, &device->pnp.ids, list) {
if (ispnpidacpi(id->id))
return id->id;
}
return NULL;
}
static int __init pnpacpi_add_device(struct acpi_device *device)
{
acpi_handle temp = NULL;
acpi_status status;
struct pnp_dev *dev;
char *pnpid;
struct acpi_hardware_id *id;
/*
@ -192,11 +205,17 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
* driver should not be loaded.
*/
status = acpi_get_handle(device->handle, "_CRS", &temp);
if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
is_exclusive_device(device) || (!device->status.present))
if (ACPI_FAILURE(status))
return 0;
dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
pnpid = pnpacpi_get_id(device);
if (!pnpid)
return 0;
if (is_exclusive_device(device) || !device->status.present)
return 0;
dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
if (!dev)
return -ENOMEM;
@ -227,7 +246,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
pnpacpi_parse_resource_option_data(dev);
list_for_each_entry(id, &device->pnp.ids, list) {
if (!strcmp(id->id, acpi_device_hid(device)))
if (!strcmp(id->id, pnpid))
continue;
if (!ispnpidacpi(id->id))
continue;