[patch 39/53] PNP: make generic pnp_add_irq_resource()

[Bjorn Helgaas <bjorn.helgaas@hp.com>]

[-- Attachment #1: pnp-common-add-irq-resource --]
[-- Type: text/plain, Size: 6689 bytes --]

Add a pnp_add_irq_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>

---
 drivers/pnp/base.h             |    3 +++
 drivers/pnp/resource.c         |   24 ++++++++++++++++++++++++
 drivers/pnp/interface.c        |   14 ++++++--------
 drivers/pnp/isapnp/core.c      |    8 +++-----
 drivers/pnp/pnpacpi/rsparser.c |   31 +++++++------------------------
 drivers/pnp/pnpbios/rsparser.c |   31 +++++++------------------------
 6 files changed, 50 insertions(+), 61 deletions(-)

Index: work8/drivers/pnp/base.h
===================================================================
--- work8.orig/drivers/pnp/base.h	2008-04-17 15:05:12.000000000 -0600
+++ work8/drivers/pnp/base.h	2008-04-18 11:00:36.000000000 -0600
@@ -35,3 +35,6 @@
 	struct pnp_resource dma[PNP_MAX_DMA];
 	struct pnp_resource irq[PNP_MAX_IRQ];
 };
+
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+					  int flags);
Index: work8/drivers/pnp/resource.c
===================================================================
--- work8.orig/drivers/pnp/resource.c	2008-04-17 15:05:13.000000000 -0600
+++ work8/drivers/pnp/resource.c	2008-04-18 11:00:36.000000000 -0600
@@ -559,6 +559,30 @@
 	return NULL;
 }
 
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+					  int flags)
+{
+	struct pnp_resource *pnp_res;
+	struct resource *res;
+	static unsigned char warned;
+
+	pnp_res = pnp_new_resource(dev, IORESOURCE_IRQ);
+	if (!pnp_res) {
+		if (!warned) {
+			dev_err(&dev->dev, "can't add resource for IRQ %d\n",
+				irq);
+			warned = 1;
+		}
+		return NULL;
+	}
+
+	res = &pnp_res->res;
+	res->flags = IORESOURCE_IRQ | flags;
+	res->start = irq;
+	res->end = irq;
+	return pnp_res;
+}
+
 /* format is: pnp_reserve_irq=irq1[,irq2] .... */
 static int __init pnp_setup_reserve_irq(char *str)
 {
Index: work8/drivers/pnp/interface.c
===================================================================
--- work8.orig/drivers/pnp/interface.c	2008-04-17 14:56:51.000000000 -0600
+++ work8/drivers/pnp/interface.c	2008-04-18 11:02:06.000000000 -0600
@@ -322,9 +322,11 @@
 			  const char *ubuf, size_t count)
 {
 	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;
 
 	if (dev->status & PNP_ATTACHED) {
 		retval = -EBUSY;
@@ -426,14 +428,10 @@
 				buf += 3;
 				while (isspace(*buf))
 					++buf;
-				res = pnp_get_resource(dev, IORESOURCE_IRQ,
-						       nirq);
-				if (!res)
-					break;
-				res->start = res->end =
-				    simple_strtoul(buf, &buf, 0);
-				res->flags = IORESOURCE_IRQ;
-				nirq++;
+				start = simple_strtoul(buf, &buf, 0);
+				pnp_res = pnp_add_irq_resource(dev, start, 0);
+				if (pnp_res)
+					pnp_res->index = nirq++;
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {
Index: work8/drivers/pnp/isapnp/core.c
===================================================================
--- work8.orig/drivers/pnp/isapnp/core.c	2008-04-17 15:05:12.000000000 -0600
+++ work8/drivers/pnp/isapnp/core.c	2008-04-18 11:00:36.000000000 -0600
@@ -956,11 +956,9 @@
 			     8);
 			if (!ret)
 				continue;
-			pnp_res = &dev->res->irq[tmp];
-			pnp_res->index = tmp;
-			res = &pnp_res->res;
-			res->start = res->end = ret;
-			res->flags = IORESOURCE_IRQ;
+			pnp_res = pnp_add_irq_resource(dev, ret, 0);
+			if (pnp_res)
+				pnp_res->index = tmp;
 		}
 		for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
 			ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
Index: work8/drivers/pnp/pnpacpi/rsparser.c
===================================================================
--- work8.orig/drivers/pnp/pnpacpi/rsparser.c	2008-04-17 15:04:41.000000000 -0600
+++ work8/drivers/pnp/pnpacpi/rsparser.c	2008-04-18 11:00:36.000000000 -0600
@@ -82,26 +82,12 @@
 						u32 gsi, int triggering,
 						int polarity, int shareable)
 {
-	struct resource *res;
-	int i;
-	int irq;
+	int irq, flags;
 	int p, t;
-	static unsigned char warned;
 
 	if (!valid_IRQ(gsi))
 		return;
 
-	for (i = 0; i < PNP_MAX_IRQ; i++) {
-		res = &dev->res->irq[i].res;
-		if (res->flags & IORESOURCE_UNSET)
-			break;
-	}
-	if (i >= PNP_MAX_IRQ && !warned) {
-		printk(KERN_WARNING "pnpacpi: exceeded the max number of IRQ "
-				"resources: %d \n", PNP_MAX_IRQ);
-		warned = 1;
-		return;
-	}
 	/*
 	 * in IO-APIC mode, use overrided attribute. Two reasons:
 	 * 1. BIOS bug in DSDT
@@ -119,17 +105,14 @@
 		}
 	}
 
-	res->flags = IORESOURCE_IRQ;	// Also clears _UNSET flag
-	res->flags |= irq_flags(triggering, polarity, shareable);
+	flags = irq_flags(triggering, polarity, shareable);
 	irq = acpi_register_gsi(gsi, triggering, polarity);
-	if (irq < 0) {
-		res->flags |= IORESOURCE_DISABLED;
-		return;
-	}
+	if (irq >= 0)
+		pcibios_penalize_isa_irq(irq, 1);
+	else
+		flags |= IORESOURCE_DISABLED;
 
-	res->start = irq;
-	res->end = irq;
-	pcibios_penalize_isa_irq(irq, 1);
+	pnp_add_irq_resource(dev, irq, flags);
 }
 
 static int dma_flags(int type, int bus_master, int transfer)
Index: work8/drivers/pnp/pnpbios/rsparser.c
===================================================================
--- work8.orig/drivers/pnp/pnpbios/rsparser.c	2008-04-17 15:04:41.000000000 -0600
+++ work8/drivers/pnp/pnpbios/rsparser.c	2008-04-18 11:00:36.000000000 -0600
@@ -54,28 +54,6 @@
  * Allocated Resources
  */
 
-static void pnpbios_parse_allocated_irqresource(struct pnp_dev *dev, int irq)
-{
-	struct resource *res;
-	int i;
-
-	for (i = 0; i < PNP_MAX_IRQ; i++) {
-		res = &dev->res->irq[i].res;
-		if (res->flags & IORESOURCE_UNSET)
-			break;
-	}
-
-	if (i < PNP_MAX_IRQ) {
-		res->flags = IORESOURCE_IRQ;	// Also clears _UNSET flag
-		if (irq == -1) {
-			res->flags |= IORESOURCE_DISABLED;
-			return;
-		}
-		res->start = res->end = (unsigned long)irq;
-		pcibios_penalize_isa_irq(irq, 1);
-	}
-}
-
 static void pnpbios_parse_allocated_dmaresource(struct pnp_dev *dev, int dma)
 {
 	struct resource *res;
@@ -148,7 +126,7 @@
 							    unsigned char *end)
 {
 	unsigned int len, tag;
-	int io, size, mask, i;
+	int io, size, mask, i, flags;
 
 	if (!p)
 		return NULL;
@@ -203,12 +181,17 @@
 		case SMALL_TAG_IRQ:
 			if (len < 2 || len > 3)
 				goto len_err;
+			flags = 0;
 			io = -1;
 			mask = p[1] + p[2] * 256;
 			for (i = 0; i < 16; i++, mask = mask >> 1)
 				if (mask & 0x01)
 					io = i;
-			pnpbios_parse_allocated_irqresource(dev, io);
+			if (io != -1)
+				pcibios_penalize_isa_irq(io, 1);
+			else
+				flags = IORESOURCE_DISABLED;
+			pnp_add_irq_resource(dev, io, flags);
 			break;
 
 		case SMALL_TAG_DMA:

--