PNP: make generic pnp_add_mem_resource()

Add a pnp_add_mem_resource() that can be used by all the PNP
backends.  This consolidates a little more pnp_resource_table
knowledge into one place.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

6 files changed, 57 insertions, 61 deletions

diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
index bfb08abc311..9b7bb62c98b 100644
--- a/drivers/pnp/base.h
+++ b/drivers/pnp/base.h
@@ -48,3 +48,6 @@ struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
 struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
 					 resource_size_t start,
 					 resource_size_t end, int flags);
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end, int flags);
diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
index 77d8bf01b48..5d9301de177 100644
--- a/drivers/pnp/interface.c
+++ b/drivers/pnp/interface.c
@@ -321,7 +321,6 @@ pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
 	struct pnp_resource *pnp_res;
-	struct resource *res;
 	char *buf = (void *)ubuf;
 	int retval = 0;
 	resource_size_t start, end;
@@ -402,24 +401,20 @@ pnp_set_current_resources(struct device *dmdev, struct device_attribute *attr,
 				buf += 3;
 				while (isspace(*buf))
 					++buf;
-				pnp_res = pnp_get_pnp_resource(dev,
-						IORESOURCE_MEM, nmem);
-				if (!pnp_res)
-					break;
-				pnp_res->index = nmem;
-				res = &pnp_res->res;
-				res->start = simple_strtoul(buf, &buf, 0);
+				start = simple_strtoul(buf, &buf, 0);
 				while (isspace(*buf))
 					++buf;
 				if (*buf == '-') {
 					buf += 1;
 					while (isspace(*buf))
 						++buf;
-					res->end = simple_strtoul(buf, &buf, 0);
+					end = simple_strtoul(buf, &buf, 0);
 				} else
-					res->end = res->start;
-				res->flags = IORESOURCE_MEM;
-				nmem++;
+					end = start;
+				pnp_res = pnp_add_mem_resource(dev, start, end,
+							       0);
+				if (pnp_res)
+					pnp_res->index = nmem++;
 				continue;
 			}
 			if (!strnicmp(buf, "irq", 3)) {
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
index bdd8508090d..f08399497e4 100644
--- a/drivers/pnp/isapnp/core.c
+++ b/drivers/pnp/isapnp/core.c
@@ -932,7 +932,6 @@ EXPORT_SYMBOL(isapnp_write_byte);
 static int isapnp_read_resources(struct pnp_dev *dev)
 {
 	struct pnp_resource *pnp_res;
-	struct resource *res;
 	int tmp, ret;
 
 	dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
@@ -950,12 +949,9 @@ static int isapnp_read_resources(struct pnp_dev *dev)
 			    isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
 			if (!ret)
 				continue;
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM,
-						       tmp);
-			pnp_res->index = tmp;
-			res = &pnp_res->res;
-			res->start = ret;
-			res->flags = IORESOURCE_MEM;
+			pnp_res = pnp_add_mem_resource(dev, ret, ret, 0);
+			if (pnp_res)
+				pnp_res->index = tmp;
 		}
 		for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
 			ret =
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
index d3ca8e035c1..a512908bf4e 100644
--- a/drivers/pnp/pnpacpi/rsparser.c
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -173,34 +173,18 @@ static void pnpacpi_parse_allocated_ioresource(struct pnp_dev *dev, u64 start,
 }
 
 static void pnpacpi_parse_allocated_memresource(struct pnp_dev *dev,
-						u64 mem, u64 len,
+						u64 start, u64 len,
 						int write_protect)
 {
-	struct resource *res;
-	int i;
-	static unsigned char warned;
+	int flags = 0;
+	u64 end = start + len - 1;
 
-	for (i = 0; i < PNP_MAX_MEM; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
-		if (!pnp_resource_valid(res))
-			break;
-	}
-	if (i < PNP_MAX_MEM) {
-		res->flags = IORESOURCE_MEM;	// Also clears _UNSET flag
-		if (len <= 0) {
-			res->flags |= IORESOURCE_DISABLED;
-			return;
-		}
-		if (write_protect == ACPI_READ_WRITE_MEMORY)
-			res->flags |= IORESOURCE_MEM_WRITEABLE;
-
-		res->start = mem;
-		res->end = mem + len - 1;
-	} else if (!warned) {
-		printk(KERN_WARNING "pnpacpi: exceeded the max number of mem "
-				"resources: %d\n", PNP_MAX_MEM);
-		warned = 1;
-	}
+	if (len == 0)
+		flags |= IORESOURCE_DISABLED;
+	if (write_protect == ACPI_READ_WRITE_MEMORY)
+		flags |= IORESOURCE_MEM_WRITEABLE;
+
+	pnp_add_mem_resource(dev, start, end, flags);
 }
 
 static void pnpacpi_parse_allocated_address_space(struct pnp_dev *dev,
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
index 8c83bc16a9b..ed63ecd9bf4 100644
--- a/drivers/pnp/pnpbios/rsparser.c
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -67,26 +67,15 @@ static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
 }
 
 static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
-						int mem, int len)
+						int start, int len)
 {
-	struct resource *res;
-	int i;
+	int flags = 0;
+	int end = start + len - 1;
 
-	for (i = 0; i < PNP_MAX_MEM; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
-		if (!pnp_resource_valid(res))
-			break;
-	}
+	if (len <= 0)
+		flags |= IORESOURCE_DISABLED;
 
-	if (i < PNP_MAX_MEM) {
-		res->flags = IORESOURCE_MEM;	// Also clears _UNSET flag
-		if (len <= 0) {
-			res->flags |= IORESOURCE_DISABLED;
-			return;
-		}
-		res->start = (unsigned long)mem;
-		res->end = (unsigned long)(mem + len - 1);
-	}
+	pnp_add_mem_resource(dev, start, end, flags);
 }
 
 static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
index 64387b70026..2041620d568 100644
--- a/drivers/pnp/resource.c
+++ b/drivers/pnp/resource.c
@@ -657,6 +657,35 @@ struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
 	return pnp_res;
 }
 
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+					  resource_size_t start,
+					  resource_size_t end, int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+	static unsigned char warned;
+
+	pnp_res = pnp_new_resource(dev, IORESOURCE_MEM);
+	if (!pnp_res) {
+		if (!warned) {
+			dev_err(&dev->dev, "can't add resource for MEM "
+				"%#llx-%#llx\n",(unsigned long long) start,
+				(unsigned long long) end);
+			warned = 1;
+		}
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_MEM | flags;
+	res->start = start;
+	res->end = end;
+
+	dev_dbg(&dev->dev, "  add mem %#llx-%#llx flags %#x\n",
+		(unsigned long long) start, (unsigned long long) end, flags);
+	return pnp_res;
+}
+
 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
 static int __init pnp_setup_reserve_irq(char *str)
 {