diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index abefcc351521..ba55b0623f7e 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -1,6 +1,6 @@
 extern spinlock_t pnp_lock;
 void *pnp_alloc(long size);
-int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev);
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, char *id);
 int pnp_interface_attach_device(struct pnp_dev *dev);
 void pnp_fixup_device(struct pnp_dev *dev);
 void pnp_free_option(struct pnp_option *option);
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
index e85cbf116db1..d3f869ee1d92 100644
--- a/drivers/pnp/driver.c
+++ b/drivers/pnp/driver.c
@@ -226,22 +226,36 @@ void pnp_unregister_driver(struct pnp_driver *drv)
 
 /**
  * pnp_add_id - adds an EISA id to the specified device
- * @id: pointer to a pnp_id structure
  * @dev: pointer to the desired device
+ * @id: pointer to an EISA id string
  */
-int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev)
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, char *id)
 {
-	struct pnp_id *ptr;
+	struct pnp_id *dev_id, *ptr;
 
-	id->next = NULL;
+	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	if (!dev_id)
+		return NULL;
+
+	dev_id->id[0] = id[0];
+	dev_id->id[1] = id[1];
+	dev_id->id[2] = id[2];
+	dev_id->id[3] = tolower(id[3]);
+	dev_id->id[4] = tolower(id[4]);
+	dev_id->id[5] = tolower(id[5]);
+	dev_id->id[6] = tolower(id[6]);
+	dev_id->id[7] = '\0';
+
+	dev_id->next = NULL;
 	ptr = dev->id;
 	while (ptr && ptr->next)
 		ptr = ptr->next;
 	if (ptr)
-		ptr->next = id;
+		ptr->next = dev_id;
 	else
-		dev->id = id;
-	return 0;
+		dev->id = dev_id;
+
+	return dev_id;
 }
 
 EXPORT_SYMBOL(pnp_register_driver);
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
index dd67752a5828..10cade831433 100644
--- a/drivers/pnp/isapnp/core.c
+++ b/drivers/pnp/isapnp/core.c
@@ -44,6 +44,8 @@
 #include <linux/mutex.h>
 #include <asm/io.h>
 
+#include "../base.h"
+
 #if 0
 #define ISAPNP_REGION_OK
 #endif
@@ -401,20 +403,16 @@ static void __init isapnp_skip_bytes(int count)
 static void isapnp_parse_id(struct pnp_dev *dev, unsigned short vendor,
 			    unsigned short device)
 {
-	struct pnp_id *id;
+	char id[8];
 
-	if (!dev)
-		return;
-	id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
-	if (!id)
-		return;
-	sprintf(id->id, "%c%c%c%x%x%x%x",
+	sprintf(id, "%c%c%c%x%x%x%x",
 		'A' + ((vendor >> 2) & 0x3f) - 1,
 		'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
 		'A' + ((vendor >> 8) & 0x1f) - 1,
 		(device >> 4) & 0x0f,
 		device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
-	pnp_add_id(id, dev);
+
+	pnp_add_id(dev, id);
 }
 
 /*
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index 4807d76f8a04..86aea1ebfee7 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -73,18 +73,6 @@ static int __init ispnpidacpi(char *id)
 	return 1;
 }
 
-static void __init pnpidacpi_to_pnpid(char *id, char *str)
-{
-	str[0] = id[0];
-	str[1] = id[1];
-	str[2] = id[2];
-	str[3] = tolower(id[3]);
-	str[4] = tolower(id[4]);
-	str[5] = tolower(id[5]);
-	str[6] = tolower(id[6]);
-	str[7] = '\0';
-}
-
 static int pnpacpi_get_resources(struct pnp_dev *dev,
 				 struct pnp_resource_table *res)
 {
@@ -201,12 +189,9 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 
 	dev->number = num;
 
-	/* set the initial values for the PnP device */
-	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	dev_id = pnp_add_id(dev, acpi_device_hid(device));
 	if (!dev_id)
 		goto err;
-	pnpidacpi_to_pnpid(acpi_device_hid(device), dev_id->id);
-	pnp_add_id(dev_id, dev);
 
 	if (dev->active) {
 		/* parse allocated resource */
@@ -227,7 +212,6 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 		}
 	}
 
-	/* parse compatible ids */
 	if (device->flags.compatible_ids) {
 		struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
 		int i;
@@ -235,12 +219,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
 		for (i = 0; i < cid_list->count; i++) {
 			if (!ispnpidacpi(cid_list->id[i].value))
 				continue;
-			dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
-			if (!dev_id)
-				continue;
-
-			pnpidacpi_to_pnpid(cid_list->id[i].value, dev_id->id);
-			pnp_add_id(dev_id, dev);
+			pnp_add_id(dev, cid_list->id[i].value);
 		}
 	}
 
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
index 2a5353bceb24..2d592aea0aa7 100644
--- a/drivers/pnp/pnpbios/core.c
+++ b/drivers/pnp/pnpbios/core.c
@@ -332,16 +332,14 @@ static int __init insert_device(struct pnp_bios_node *node)
 	if (!dev)
 		return -1;
 
-	dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+	pnpid32_to_pnpid(node->eisa_id, id);
+	dev_id = pnp_add_id(dev, id);
 	if (!dev_id) {
 		kfree(dev);
 		return -1;
 	}
 
 	dev->number = node->handle;
-	pnpid32_to_pnpid(node->eisa_id, id);
-	memcpy(dev_id->id, id, 7);
-	pnp_add_id(dev_id, dev);
 	pnpbios_parse_data_stream(dev, node);
 	dev->active = pnp_is_active(dev);
 	dev->flags = node->flags;
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
index caade3531416..dbc88412c12e 100644
--- a/drivers/pnp/pnpbios/rsparser.c
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -16,6 +16,7 @@ inline void pcibios_penalize_isa_irq(int irq, int active)
 }
 #endif				/* CONFIG_PCI */
 
+#include "../base.h"
 #include "pnpbios.h"
 
 /* standard resource tags */
@@ -548,13 +549,11 @@ static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
 		case SMALL_TAG_COMPATDEVID:	/* compatible ID */
 			if (len != 4)
 				goto len_err;
-			dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
-			if (!dev_id)
-				return NULL;
 			pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] <<
 					 24, id);
-			memcpy(&dev_id->id, id, 7);
-			pnp_add_id(dev_id, dev);
+			dev_id = pnp_add_id(dev, id);
+			if (!dev_id)
+				return NULL;
 			break;
 
 		case SMALL_TAG_END: