86 lines
2.5 KiB
Diff
86 lines
2.5 KiB
Diff
commit 420a0f66378c84b00b0e603e4d38210102dbe367
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Author: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Date: Sat Sep 18 10:11:09 2010 -0700
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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
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ID list before giving up.
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This helps, for example, to recognize i8042 AUX port on Sony Vaio VPCZ1
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which uses SNYSYN0003 as HID. Without the patch users are forced to
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boot with i8042.nopnp to make use of their touchpads.
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Tested-by: Jan-Hendrik Zab <jan@jhz.name>
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Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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Signed-off-by: Len Brown <len.brown@intel.com>
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diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
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index dc4e32e..0d943ee 100644
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--- a/drivers/pnp/pnpacpi/core.c
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+++ b/drivers/pnp/pnpacpi/core.c
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@@ -28,7 +28,7 @@
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#include "../base.h"
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#include "pnpacpi.h"
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-static int num = 0;
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+static int num;
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/* We need only to blacklist devices that have already an acpi driver that
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* can't use pnp layer. We don't need to blacklist device that are directly
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@@ -180,11 +180,24 @@ struct pnp_protocol pnpacpi_protocol = {
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};
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EXPORT_SYMBOL(pnpacpi_protocol);
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+static char *pnpacpi_get_id(struct acpi_device *device)
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+{
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+ struct acpi_hardware_id *id;
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+
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+ list_for_each_entry(id, &device->pnp.ids, list) {
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+ if (ispnpidacpi(id->id))
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+ return id->id;
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+ }
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+
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+ return NULL;
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+}
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+
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static int __init pnpacpi_add_device(struct acpi_device *device)
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{
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acpi_handle temp = NULL;
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acpi_status status;
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struct pnp_dev *dev;
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+ char *pnpid;
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struct acpi_hardware_id *id;
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/*
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@@ -192,11 +205,17 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
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* driver should not be loaded.
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*/
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status = acpi_get_handle(device->handle, "_CRS", &temp);
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- if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
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- is_exclusive_device(device) || (!device->status.present))
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+ if (ACPI_FAILURE(status))
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+ return 0;
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+
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+ pnpid = pnpacpi_get_id(device);
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+ if (!pnpid)
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+ return 0;
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+
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+ if (is_exclusive_device(device) || !device->status.present)
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return 0;
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- dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
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+ dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
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if (!dev)
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return -ENOMEM;
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@@ -227,7 +246,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
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pnpacpi_parse_resource_option_data(dev);
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list_for_each_entry(id, &device->pnp.ids, list) {
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- if (!strcmp(id->id, acpi_device_hid(device)))
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+ if (!strcmp(id->id, pnpid))
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continue;
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if (!ispnpidacpi(id->id))
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continue;
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