diff --git a/include/linux/pnp.h b/include/linux/pnp.h
index 63b128d..8b607ae 100644
--- a/include/linux/pnp.h
+++ b/include/linux/pnp.h
@@ -40,19 +40,31 @@
 static inline resource_size_t pnp_port_start(struct pnp_dev *dev,
 					     unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_IO, bar)->start;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
+
+	if (pnp_resource_valid(res))
+		return res->start;
+	return 0;
 }
 
 static inline resource_size_t pnp_port_end(struct pnp_dev *dev,
 					   unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_IO, bar)->end;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
+
+	if (pnp_resource_valid(res))
+		return res->end;
+	return 0;
 }
 
 static inline unsigned long pnp_port_flags(struct pnp_dev *dev,
 					   unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_IO, bar)->flags;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
+
+	if (pnp_resource_valid(res))
+		return res->flags;
+	return IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
 }
 
 static inline int pnp_port_valid(struct pnp_dev *dev, unsigned int bar)
@@ -63,25 +75,41 @@
 static inline resource_size_t pnp_port_len(struct pnp_dev *dev,
 					   unsigned int bar)
 {
-	return pnp_resource_len(pnp_get_resource(dev, IORESOURCE_IO, bar));
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IO, bar);
+
+	if (pnp_resource_valid(res))
+		return pnp_resource_len(res);
+	return 0;
 }
 
 
 static inline resource_size_t pnp_mem_start(struct pnp_dev *dev,
 					    unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_MEM, bar)->start;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
+
+	if (pnp_resource_valid(res))
+		return res->start;
+	return 0;
 }
 
 static inline resource_size_t pnp_mem_end(struct pnp_dev *dev,
 					  unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_MEM, bar)->end;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
+
+	if (pnp_resource_valid(res))
+		return res->end;
+	return 0;
 }
 
 static inline unsigned long pnp_mem_flags(struct pnp_dev *dev, unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_MEM, bar)->flags;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
+
+	if (pnp_resource_valid(res))
+		return res->flags;
+	return IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
 }
 
 static inline int pnp_mem_valid(struct pnp_dev *dev, unsigned int bar)
@@ -92,18 +120,30 @@
 static inline resource_size_t pnp_mem_len(struct pnp_dev *dev,
 					  unsigned int bar)
 {
-	return pnp_resource_len(pnp_get_resource(dev, IORESOURCE_MEM, bar));
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_MEM, bar);
+
+	if (pnp_resource_valid(res))
+		return pnp_resource_len(res);
+	return 0;
 }
 
 
 static inline resource_size_t pnp_irq(struct pnp_dev *dev, unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_IRQ, bar)->start;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
+
+	if (pnp_resource_valid(res))
+		return res->start;
+	return -1;
 }
 
 static inline unsigned long pnp_irq_flags(struct pnp_dev *dev, unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_IRQ, bar)->flags;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_IRQ, bar);
+
+	if (pnp_resource_valid(res))
+		return res->flags;
+	return IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
 }
 
 static inline int pnp_irq_valid(struct pnp_dev *dev, unsigned int bar)
@@ -114,12 +154,20 @@
 
 static inline resource_size_t pnp_dma(struct pnp_dev *dev, unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_DMA, bar)->start;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
+
+	if (pnp_resource_valid(res))
+		return res->start;
+	return -1;
 }
 
 static inline unsigned long pnp_dma_flags(struct pnp_dev *dev, unsigned int bar)
 {
-	return pnp_get_resource(dev, IORESOURCE_DMA, bar)->flags;
+	struct resource *res = pnp_get_resource(dev, IORESOURCE_DMA, bar);
+
+	if (pnp_resource_valid(res))
+		return res->flags;
+	return IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
 }
 
 static inline int pnp_dma_valid(struct pnp_dev *dev, unsigned int bar)