[patch 0/8] PNP: convert resource table to dynamic list, v1

[patch 0/8] PNP: convert resource table to dynamic list, v1

[Bjorn Helgaas]

This series replaces the fixed-size pnp_resource_table with a
linked list of resources.

The first patch is in -mm already and should appear in Linus'
tree soon, so just skip that patch if necessary.

As a reminder, if anybody tests this and sees problems, the
dmesg log with CONFIG_PNP_DEBUG enabled would be a great help
to me.

Bjorn

-- 

[patch 0/8] PNP: convert resource table to dynamic list, v1

[Bjorn Helgaas]

This series replaces the fixed-size pnp_resource_table with a
linked list of resources.

The first patch is in -mm already and should appear in Linus'
tree soon, so just skip that patch if necessary.

As a reminder, if anybody tests this and sees problems, the
dmesg log with CONFIG_PNP_DEBUG enabled would be a great help
to me.

Bjorn

-- 

[patch 1/8] PNP: set IRQ index in sysfs "set irq" interface

[Bjorn Helgaas]

[-- Attachment #1: pnp-interface-fixup --]
[-- Type: text/plain, Size: 737 bytes --]

We have to set the ISAPNP register index when setting an IRQ via
the sysfs interface.  We already do it for IO, MEM, and DMA
resources; I just missed the IRQ one.

This should be in 2.6.26.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-01 15:26:28.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-01 15:26:39.000000000 -0600
@@ -424,7 +424,7 @@
 				start = simple_strtoul(buf, &buf, 0);
 				pnp_res = pnp_add_irq_resource(dev, start, 0);
 				if (pnp_res)
-					nirq++;
+					pnp_res->index = nirq++;
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {

-- 

[patch 1/8] PNP: set IRQ index in sysfs "set irq" interface

[Bjorn Helgaas]

[-- Attachment #1: pnp-interface-fixup --]
[-- Type: text/plain, Size: 737 bytes --]

We have to set the ISAPNP register index when setting an IRQ via
the sysfs interface.  We already do it for IO, MEM, and DMA
resources; I just missed the IRQ one.

This should be in 2.6.26.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-01 15:26:28.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-01 15:26:39.000000000 -0600
@@ -424,7 +424,7 @@
 				start = simple_strtoul(buf, &buf, 0);
 				pnp_res = pnp_add_irq_resource(dev, start, 0);
 				if (pnp_res)
-					nirq++;
+					pnp_res->index = nirq++;
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {

-- 

[patch 2/8] PNP: add detail to debug resource dump

[Bjorn Helgaas]

[-- Attachment #1: pnp-better-resource-dump --]
[-- Type: text/plain, Size: 2480 bytes --]

In the debug resource dump, decode the flags and indicate when
a resource is disabled or has been automatically assigned.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-02 11:18:50.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 09:39:03.000000000 -0600
@@ -63,28 +63,46 @@ void dbg_pnp_show_resources(struct pnp_d
 	for (i = 0; i < PNP_MAX_IRQ; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_IRQ, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  irq %lld flags %#lx\n",
-				(unsigned long long) res->start, res->flags);
+			dev_dbg(&dev->dev, "  irq %lld flags %#lx%s%s\n",
+				(unsigned long long) res->start, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_DMA; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_DMA, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  dma %lld flags %#lx\n",
-				(unsigned long long) res->start, res->flags);
+			dev_dbg(&dev->dev, "  dma %lld flags %#lx%s%s\n",
+				(unsigned long long) res->start, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_PORT; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_IO, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx\n",
+			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx"
+				"%s%s\n",
 				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags);
+				(unsigned long long) res->end, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_MEM; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx\n",
+			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx"
+				"%s%s\n",
 				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags);
+				(unsigned long long) res->end, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 #endif
 }

-- 

[patch 2/8] PNP: add detail to debug resource dump

[Bjorn Helgaas]

[-- Attachment #1: pnp-better-resource-dump --]
[-- Type: text/plain, Size: 2480 bytes --]

In the debug resource dump, decode the flags and indicate when
a resource is disabled or has been automatically assigned.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-02 11:18:50.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 09:39:03.000000000 -0600
@@ -63,28 +63,46 @@ void dbg_pnp_show_resources(struct pnp_d
 	for (i = 0; i < PNP_MAX_IRQ; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_IRQ, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  irq %lld flags %#lx\n",
-				(unsigned long long) res->start, res->flags);
+			dev_dbg(&dev->dev, "  irq %lld flags %#lx%s%s\n",
+				(unsigned long long) res->start, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_DMA; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_DMA, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  dma %lld flags %#lx\n",
-				(unsigned long long) res->start, res->flags);
+			dev_dbg(&dev->dev, "  dma %lld flags %#lx%s%s\n",
+				(unsigned long long) res->start, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_PORT; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_IO, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx\n",
+			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx"
+				"%s%s\n",
 				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags);
+				(unsigned long long) res->end, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 	for (i = 0; i < PNP_MAX_MEM; i++) {
 		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
 		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx\n",
+			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx"
+				"%s%s\n",
 				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags);
+				(unsigned long long) res->end, res->flags,
+				res->flags & IORESOURCE_DISABLED ?
+					" DISABLED" : "",
+				res->flags & IORESOURCE_AUTO ?
+					" AUTO" : "");
 	}
 #endif
 }

-- 

Re: [patch 2/8] PNP: add detail to debug resource dump

[Rene Herman]

On 06-05-08 00:36, Bjorn Helgaas wrote:

> In the debug resource dump, decode the flags and indicate when
> a resource is disabled or has been automatically assigned.
> 
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Acked-by: Rene Herman <rene.herman@gmail.com>

Rene.

[patch 3/8] PNP: remove pnp_resource.index

[Bjorn Helgaas]

[-- Attachment #1: pnp-remove-pnp_resource-index --]
[-- Type: text/plain, Size: 9050 bytes --]

We used pnp_resource.index to keep track of which ISAPNP configuration
register a resource should be written to.  We needed this only to
handle the case where a register is disabled but a subsequent register
in the same set is enabled.

Rather than explicitly maintaining the pnp_resource.index, this patch
adds a resource every time we read an ISAPNP configuration register
and marks the resource as IORESOURCE_DISABLED when appropriate.  This
makes the position in the pnp_resource_table always correspond to the
config register index.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

---
 drivers/pnp/base.h        |    1 
 drivers/pnp/interface.c   |   20 ++---------
 drivers/pnp/isapnp/core.c |   80 ++++++++++++++--------------------------------
 drivers/pnp/manager.c     |    4 --
 4 files changed, 29 insertions(+), 76 deletions(-)

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 15:59:00.000000000 -0600
@@ -56,7 +56,6 @@ struct pnp_resource *pnp_get_pnp_resourc
 
 struct pnp_resource {
 	struct resource res;
-	unsigned int index;		/* ISAPNP config register index */
 };
 
 struct pnp_resource_table {
Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 15:58:49.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 15:59:00.000000000 -0600
@@ -320,7 +320,6 @@ pnp_set_current_resources(struct device 
 			  const char *ubuf, size_t count)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
-	struct pnp_resource *pnp_res;
 	char *buf = (void *)ubuf;
 	int retval = 0;
 	resource_size_t start, end;
@@ -368,7 +367,6 @@ pnp_set_current_resources(struct device 
 		goto done;
 	}
 	if (!strnicmp(buf, "set", 3)) {
-		int nport = 0, nmem = 0, nirq = 0, ndma = 0;
 		if (dev->active)
 			goto done;
 		buf += 3;
@@ -391,10 +389,7 @@ pnp_set_current_resources(struct device 
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
-				pnp_res = pnp_add_io_resource(dev, start, end,
-							      0);
-				if (pnp_res)
-					pnp_res->index = nport++;
+				pnp_add_io_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "mem", 3)) {
@@ -411,10 +406,7 @@ pnp_set_current_resources(struct device 
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
-				pnp_res = pnp_add_mem_resource(dev, start, end,
-							       0);
-				if (pnp_res)
-					pnp_res->index = nmem++;
+				pnp_add_mem_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "irq", 3)) {
@@ -422,9 +414,7 @@ pnp_set_current_resources(struct device 
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
-				pnp_res = pnp_add_irq_resource(dev, start, 0);
-				if (pnp_res)
-					pnp_res->index = nirq++;
+				pnp_add_irq_resource(dev, start, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {
@@ -432,9 +422,7 @@ pnp_set_current_resources(struct device 
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
-				pnp_res = pnp_add_dma_resource(dev, start, 0);
-				if (pnp_res)
-					pnp_res->index = ndma++;
+				pnp_add_dma_resource(dev, start, 0);
 				continue;
 			}
 			break;
Index: work10/drivers/pnp/isapnp/core.c
===================================================================
--- work10.orig/drivers/pnp/isapnp/core.c	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/isapnp/core.c	2008-05-05 16:09:19.000000000 -0600
@@ -928,7 +928,6 @@ EXPORT_SYMBOL(isapnp_write_byte);
 
 static int isapnp_get_resources(struct pnp_dev *dev)
 {
-	struct pnp_resource *pnp_res;
 	int i, ret;
 
 	dev_dbg(&dev->dev, "get resources\n");
@@ -940,35 +939,23 @@ static int isapnp_get_resources(struct p
 
 	for (i = 0; i < ISAPNP_MAX_PORT; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
-		if (ret) {
-			pnp_res = pnp_add_io_resource(dev, ret, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_io_resource(dev, ret, ret,
+				    ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_MEM; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
-		if (ret) {
-			pnp_res = pnp_add_mem_resource(dev, ret, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_mem_resource(dev, ret, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
-		if (ret) {
-			pnp_res = pnp_add_irq_resource(dev, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_irq_resource(dev, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_DMA; i++) {
 		ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
-		if (ret != 4) {
-			pnp_res = pnp_add_dma_resource(dev, ret, 0);
-			if  (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_dma_resource(dev, ret,
+				     ret == 4 ? IORESOURCE_DISABLED : 0);
 	}
 
 __end:
@@ -978,62 +965,49 @@ __end:
 
 static int isapnp_set_resources(struct pnp_dev *dev)
 {
-	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int tmp, index;
+	int tmp;
 
 	dev_dbg(&dev->dev, "set resources\n");
 	isapnp_cfg_begin(dev->card->number, dev->number);
 	dev->active = 1;
 	for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set io  %d to %#llx\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_word(ISAPNP_CFG_PORT + (index << 1),
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
 					  res->start);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
+		res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			int irq = res->start;
 			if (irq == 2)
 				irq = 9;
-			index = pnp_res->index;
-			dev_dbg(&dev->dev, "  set irq %d to %d\n", index, irq);
-			isapnp_write_byte(ISAPNP_CFG_IRQ + (index << 1), irq);
+			dev_dbg(&dev->dev, "  set irq %d to %d\n", tmp, irq);
+			isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set dma %d to %lld\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_byte(ISAPNP_CFG_DMA + index, res->start);
+				tmp, (unsigned long long) res->start);
+			isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set mem %d to %#llx\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_word(ISAPNP_CFG_MEM + (index << 3),
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
 					  (res->start >> 8) & 0xffff);
 		}
 	}
Index: work10/drivers/pnp/manager.c
===================================================================
--- work10.orig/drivers/pnp/manager.c	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/manager.c	2008-05-05 15:59:00.000000000 -0600
@@ -40,7 +40,6 @@ static int pnp_assign_port(struct pnp_de
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_IO;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -90,7 +89,6 @@ static int pnp_assign_mem(struct pnp_dev
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_MEM;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -155,7 +153,6 @@ static int pnp_assign_irq(struct pnp_dev
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_IRQ;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -214,7 +211,6 @@ static void pnp_assign_dma(struct pnp_de
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_DMA;
 	res->flags &= ~IORESOURCE_UNSET;
 

-- 

[patch 3/8] PNP: remove pnp_resource.index

[Bjorn Helgaas]

[-- Attachment #1: pnp-remove-pnp_resource-index --]
[-- Type: text/plain, Size: 9050 bytes --]

We used pnp_resource.index to keep track of which ISAPNP configuration
register a resource should be written to.  We needed this only to
handle the case where a register is disabled but a subsequent register
in the same set is enabled.

Rather than explicitly maintaining the pnp_resource.index, this patch
adds a resource every time we read an ISAPNP configuration register
and marks the resource as IORESOURCE_DISABLED when appropriate.  This
makes the position in the pnp_resource_table always correspond to the
config register index.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

---
 drivers/pnp/base.h        |    1 
 drivers/pnp/interface.c   |   20 ++---------
 drivers/pnp/isapnp/core.c |   80 ++++++++++++++--------------------------------
 drivers/pnp/manager.c     |    4 --
 4 files changed, 29 insertions(+), 76 deletions(-)

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 15:59:00.000000000 -0600
@@ -56,7 +56,6 @@ struct pnp_resource *pnp_get_pnp_resourc
 
 struct pnp_resource {
 	struct resource res;
-	unsigned int index;		/* ISAPNP config register index */
 };
 
 struct pnp_resource_table {
Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 15:58:49.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 15:59:00.000000000 -0600
@@ -320,7 +320,6 @@ pnp_set_current_resources(struct device 
 			  const char *ubuf, size_t count)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
-	struct pnp_resource *pnp_res;
 	char *buf = (void *)ubuf;
 	int retval = 0;
 	resource_size_t start, end;
@@ -368,7 +367,6 @@ pnp_set_current_resources(struct device 
 		goto done;
 	}
 	if (!strnicmp(buf, "set", 3)) {
-		int nport = 0, nmem = 0, nirq = 0, ndma = 0;
 		if (dev->active)
 			goto done;
 		buf += 3;
@@ -391,10 +389,7 @@ pnp_set_current_resources(struct device 
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
-				pnp_res = pnp_add_io_resource(dev, start, end,
-							      0);
-				if (pnp_res)
-					pnp_res->index = nport++;
+				pnp_add_io_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "mem", 3)) {
@@ -411,10 +406,7 @@ pnp_set_current_resources(struct device 
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
-				pnp_res = pnp_add_mem_resource(dev, start, end,
-							       0);
-				if (pnp_res)
-					pnp_res->index = nmem++;
+				pnp_add_mem_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "irq", 3)) {
@@ -422,9 +414,7 @@ pnp_set_current_resources(struct device 
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
-				pnp_res = pnp_add_irq_resource(dev, start, 0);
-				if (pnp_res)
-					pnp_res->index = nirq++;
+				pnp_add_irq_resource(dev, start, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {
@@ -432,9 +422,7 @@ pnp_set_current_resources(struct device 
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
-				pnp_res = pnp_add_dma_resource(dev, start, 0);
-				if (pnp_res)
-					pnp_res->index = ndma++;
+				pnp_add_dma_resource(dev, start, 0);
 				continue;
 			}
 			break;
Index: work10/drivers/pnp/isapnp/core.c
===================================================================
--- work10.orig/drivers/pnp/isapnp/core.c	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/isapnp/core.c	2008-05-05 16:09:19.000000000 -0600
@@ -928,7 +928,6 @@ EXPORT_SYMBOL(isapnp_write_byte);
 
 static int isapnp_get_resources(struct pnp_dev *dev)
 {
-	struct pnp_resource *pnp_res;
 	int i, ret;
 
 	dev_dbg(&dev->dev, "get resources\n");
@@ -940,35 +939,23 @@ static int isapnp_get_resources(struct p
 
 	for (i = 0; i < ISAPNP_MAX_PORT; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
-		if (ret) {
-			pnp_res = pnp_add_io_resource(dev, ret, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_io_resource(dev, ret, ret,
+				    ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_MEM; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
-		if (ret) {
-			pnp_res = pnp_add_mem_resource(dev, ret, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_mem_resource(dev, ret, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
 		ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
-		if (ret) {
-			pnp_res = pnp_add_irq_resource(dev, ret, 0);
-			if (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_irq_resource(dev, ret,
+				     ret == 0 ? IORESOURCE_DISABLED : 0);
 	}
 	for (i = 0; i < ISAPNP_MAX_DMA; i++) {
 		ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
-		if (ret != 4) {
-			pnp_res = pnp_add_dma_resource(dev, ret, 0);
-			if  (pnp_res)
-				pnp_res->index = i;
-		}
+		pnp_add_dma_resource(dev, ret,
+				     ret == 4 ? IORESOURCE_DISABLED : 0);
 	}
 
 __end:
@@ -978,62 +965,49 @@ __end:
 
 static int isapnp_set_resources(struct pnp_dev *dev)
 {
-	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int tmp, index;
+	int tmp;
 
 	dev_dbg(&dev->dev, "set resources\n");
 	isapnp_cfg_begin(dev->card->number, dev->number);
 	dev->active = 1;
 	for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set io  %d to %#llx\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_word(ISAPNP_CFG_PORT + (index << 1),
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
 					  res->start);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
+		res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			int irq = res->start;
 			if (irq == 2)
 				irq = 9;
-			index = pnp_res->index;
-			dev_dbg(&dev->dev, "  set irq %d to %d\n", index, irq);
-			isapnp_write_byte(ISAPNP_CFG_IRQ + (index << 1), irq);
+			dev_dbg(&dev->dev, "  set irq %d to %d\n", tmp, irq);
+			isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set dma %d to %lld\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_byte(ISAPNP_CFG_DMA + index, res->start);
+				tmp, (unsigned long long) res->start);
+			isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
 		}
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
-		pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, tmp);
-		if (!pnp_res)
-			continue;
-		res = &pnp_res->res;
-		if (pnp_resource_valid(res)) {
-			index = pnp_res->index;
+		res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
+		if (res && pnp_resource_valid(res) &&
+		    !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set mem %d to %#llx\n",
-				index, (unsigned long long) res->start);
-			isapnp_write_word(ISAPNP_CFG_MEM + (index << 3),
+				tmp, (unsigned long long) res->start);
+			isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
 					  (res->start >> 8) & 0xffff);
 		}
 	}
Index: work10/drivers/pnp/manager.c
===================================================================
--- work10.orig/drivers/pnp/manager.c	2008-05-05 15:58:47.000000000 -0600
+++ work10/drivers/pnp/manager.c	2008-05-05 15:59:00.000000000 -0600
@@ -40,7 +40,6 @@ static int pnp_assign_port(struct pnp_de
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_IO;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -90,7 +89,6 @@ static int pnp_assign_mem(struct pnp_dev
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_MEM;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -155,7 +153,6 @@ static int pnp_assign_irq(struct pnp_dev
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_IRQ;
 	res->flags &= ~IORESOURCE_UNSET;
 
@@ -214,7 +211,6 @@ static void pnp_assign_dma(struct pnp_de
 	}
 
 	/* set the initial values */
-	pnp_res->index = idx;
 	res->flags |= rule->flags | IORESOURCE_DMA;
 	res->flags &= ~IORESOURCE_UNSET;
 

-- 

Re: [patch 3/8] PNP: remove pnp_resource.index

[Rene Herman]

On 06-05-08 00:36, Bjorn Helgaas wrote:

> We used pnp_resource.index to keep track of which ISAPNP configuration
> register a resource should be written to.  We needed this only to
> handle the case where a register is disabled but a subsequent register
> in the same set is enabled.
> 
> Rather than explicitly maintaining the pnp_resource.index, this patch
> adds a resource every time we read an ISAPNP configuration register
> and marks the resource as IORESOURCE_DISABLED when appropriate.  This
> makes the position in the pnp_resource_table always correspond to the
> config register index.
> 
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

> -			pnp_res = pnp_add_io_resource(dev, start, end,
> -						      0);
> -			if (pnp_res)
> -				pnp_res->index = nport++;
> +			pnp_add_io_resource(dev, start, end, 0);

In the tree after your v2 series, pnp_add_foo_resource() are called as 
void functions yet still return a struct pnp_resource *. You might have 
other plans but if not, I guess they can _be_ void functions?

Otherwise:

Acked-by: Rene Herman <rene.herman@gmail.com>

Rene.

Re: [patch 3/8] PNP: remove pnp_resource.index

[Bjorn Helgaas]

On Monday 19 May 2008 04:01:32 pm Rene Herman wrote:
> On 06-05-08 00:36, Bjorn Helgaas wrote:
> 
> > We used pnp_resource.index to keep track of which ISAPNP configuration
> > register a resource should be written to.  We needed this only to
> > handle the case where a register is disabled but a subsequent register
> > in the same set is enabled.
> > 
> > Rather than explicitly maintaining the pnp_resource.index, this patch
> > adds a resource every time we read an ISAPNP configuration register
> > and marks the resource as IORESOURCE_DISABLED when appropriate.  This
> > makes the position in the pnp_resource_table always correspond to the
> > config register index.
> > 
> > Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
> 
> > -			pnp_res = pnp_add_io_resource(dev, start, end,
> > -						      0);
> > -			if (pnp_res)
> > -				pnp_res->index = nport++;
> > +			pnp_add_io_resource(dev, start, end, 0);
> 
> In the tree after your v2 series, pnp_add_foo_resource() are called as 
> void functions yet still return a struct pnp_resource *. You might have 
> other plans but if not, I guess they can _be_ void functions?

You're right, I still don't do anything with the return value.  It
could be used to check for success/failure, but we currently don't
do that.  Possibly a future cleanup since there's no functional
problem here.

Bjorn

[patch 4/8] PNP: add pnp_resource_type() internal interface

[Bjorn Helgaas]

[-- Attachment #1: pnp-add-pnp_resource_type --]
[-- Type: text/plain, Size: 1284 bytes --]

Given a struct resource, this returns the type (IO, MEM, IRQ, DMA).

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-02 14:23:13.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 09:39:03.000000000 -0600
@@ -45,6 +45,7 @@ int pnp_check_dma(struct pnp_dev *dev, s
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
 void pnp_init_resource(struct resource *res);
+int pnp_resource_type(struct resource *res);
 
 struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
 					  unsigned int type, unsigned int num);
Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-02 14:23:13.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 09:38:57.000000000 -0600
@@ -499,6 +499,12 @@ int pnp_check_dma(struct pnp_dev *dev, s
 #endif
 }
 
+int pnp_resource_type(struct resource *res)
+{
+	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
+			     IORESOURCE_IRQ | IORESOURCE_DMA);
+}
+
 struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
 					  unsigned int type, unsigned int num)
 {

-- 

[patch 4/8] PNP: add pnp_resource_type() internal interface

[Bjorn Helgaas]

[-- Attachment #1: pnp-add-pnp_resource_type --]
[-- Type: text/plain, Size: 1284 bytes --]

Given a struct resource, this returns the type (IO, MEM, IRQ, DMA).

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-02 14:23:13.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 09:39:03.000000000 -0600
@@ -45,6 +45,7 @@ int pnp_check_dma(struct pnp_dev *dev, s
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
 void pnp_init_resource(struct resource *res);
+int pnp_resource_type(struct resource *res);
 
 struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
 					  unsigned int type, unsigned int num);
Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-02 14:23:13.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 09:38:57.000000000 -0600
@@ -499,6 +499,12 @@ int pnp_check_dma(struct pnp_dev *dev, s
 #endif
 }
 
+int pnp_resource_type(struct resource *res)
+{
+	return res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
+			     IORESOURCE_IRQ | IORESOURCE_DMA);
+}
+
 struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
 					  unsigned int type, unsigned int num)
 {

-- 

Re: [patch 4/8] PNP: add pnp_resource_type() internal interface

[Rene Herman]

On 06-05-08 00:36, Bjorn Helgaas wrote:

> Given a struct resource, this returns the type (IO, MEM, IRQ, DMA).
> 
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Acked-by: Rene Herman <rene.herman@gmail.com>

Rene.

[patch 5/8] PNP: add pnp_resource_type_name() helper function

[Bjorn Helgaas]

[-- Attachment #1: pnp-add-resource-type-name --]
[-- Type: text/plain, Size: 1527 bytes --]

This patch adds a "pnp_resource_type_name(struct resource *)" that
returns the string resource type.  This will be used by the sysfs
"show resources" function and the debug resource dump function.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-02 14:28:40.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 09:38:56.000000000 -0600
@@ -42,6 +42,7 @@ int pnp_check_mem(struct pnp_dev *dev, s
 int pnp_check_irq(struct pnp_dev *dev, struct resource *res);
 int pnp_check_dma(struct pnp_dev *dev, struct resource *res);
 
+char *pnp_resource_type_name(struct resource *res);
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
 void pnp_init_resource(struct resource *res);
Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-02 11:18:54.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 09:38:57.000000000 -0600
@@ -52,6 +52,21 @@ void pnp_eisa_id_to_string(u32 id, char 
 	str[7] = '\0';
 }
 
+char *pnp_resource_type_name(struct resource *res)
+{
+	switch (pnp_resource_type(res)) {
+	case IORESOURCE_IO:
+		return "io";
+	case IORESOURCE_MEM:
+		return "mem";
+	case IORESOURCE_IRQ:
+		return "irq";
+	case IORESOURCE_DMA:
+		return "dma";
+	}
+	return NULL;
+}
+
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
 {
 #ifdef DEBUG

-- 

[patch 5/8] PNP: add pnp_resource_type_name() helper function

[Bjorn Helgaas]

[-- Attachment #1: pnp-add-resource-type-name --]
[-- Type: text/plain, Size: 1527 bytes --]

This patch adds a "pnp_resource_type_name(struct resource *)" that
returns the string resource type.  This will be used by the sysfs
"show resources" function and the debug resource dump function.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-02 14:28:40.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 09:38:56.000000000 -0600
@@ -42,6 +42,7 @@ int pnp_check_mem(struct pnp_dev *dev, s
 int pnp_check_irq(struct pnp_dev *dev, struct resource *res);
 int pnp_check_dma(struct pnp_dev *dev, struct resource *res);
 
+char *pnp_resource_type_name(struct resource *res);
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
 void pnp_init_resource(struct resource *res);
Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-02 11:18:54.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 09:38:57.000000000 -0600
@@ -52,6 +52,21 @@ void pnp_eisa_id_to_string(u32 id, char 
 	str[7] = '\0';
 }
 
+char *pnp_resource_type_name(struct resource *res)
+{
+	switch (pnp_resource_type(res)) {
+	case IORESOURCE_IO:
+		return "io";
+	case IORESOURCE_MEM:
+		return "mem";
+	case IORESOURCE_IRQ:
+		return "irq";
+	case IORESOURCE_DMA:
+		return "dma";
+	}
+	return NULL;
+}
+
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
 {
 #ifdef DEBUG

-- 

Re: [patch 5/8] PNP: add pnp_resource_type_name() helper function

[Rene Herman]

On 06-05-08 00:36, Bjorn Helgaas wrote:

> This patch adds a "pnp_resource_type_name(struct resource *)" that
> returns the string resource type.  This will be used by the sysfs
> "show resources" function and the debug resource dump function.
> 
> Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Acked-by: Rene Herman <rene.herman@gmail.com>

Rene.

[patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Bjorn Helgaas]

[-- Attachment #1: pnp-convert-to-lists --]
[-- Type: text/plain, Size: 30529 bytes --]

PNP used to have a fixed-size pnp_resource_table for tracking the
resources used by a device.  This table often overflowed, so we've
had to increase the table size, which wastes memory because most
devices have very few resources.

This patch replaces the table with a linked list of resources where
the entries are allocated on demand.

This removes messages like these:

    pnpacpi: exceeded the max number of IO resources
    00:01: too many I/O port resources

References:

    http://bugzilla.kernel.org/show_bug.cgi?id=9535
    http://bugzilla.kernel.org/show_bug.cgi?id=9740
    http://lkml.org/lkml/2007/11/30/110

This patch also changes the way PNP uses the IORESOURCE_UNSET,
IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.

Prior to this patch, the pnp_resource_table entries used the flags
like this:

    IORESOURCE_UNSET
	This table entry is unused and available for use.  When this flag
	is set, we shouldn't look at anything else in the resource structure.
	This flag is set when a resource table entry is initialized.

    IORESOURCE_AUTO
	This resource was assigned automatically by pnp_assign_{io,mem,etc}().

	This flag is set when a resource table entry is initialized and
	cleared whenever we discover a resource setting by reading an ISAPNP
	config register, parsing a PNPBIOS resource data stream, parsing an
	ACPI _CRS list, or interpreting a sysfs "set" command.

	Resources marked IORESOURCE_AUTO are reinitialized and marked as
	IORESOURCE_UNSET by pnp_clean_resource_table() in these cases:

	    - before we attempt to assign resources automatically,
	    - if we fail to assign resources automatically,
	    - after disabling a device

    IORESOURCE_DISABLED
	Set by pnp_assign_{io,mem,etc}() when automatic assignment fails.
	Also set by PNPBIOS and PNPACPI for:

	    - invalid IRQs or GSI registration failures
	    - invalid DMA channels
	    - I/O ports above 0x10000
	    - mem ranges with negative length

After this patch, there is no pnp_resource_table, and the resource list
entries use the flags like this:

    IORESOURCE_UNSET
	This flag is no longer used in PNP.  Instead of keeping
	IORESOURCE_UNSET entries in the resource list, we remove
	entries from the list and free them.

    IORESOURCE_AUTO
	No change in meaning: it still means the resource was assigned
	automatically by pnp_assign_{port,mem,etc}(), but these functions
	now set the bit explicitly.

	We still "clean" a device's resource list in the same places,
	but rather than reinitializing IORESOURCE_AUTO entries, we
	just remove them from the list.

	Note that IORESOURCE_AUTO entries are always at the end of the
	list, so removing them doesn't reorder other list entries.
	This is because non-IORESOURCE_AUTO entries are added by the
	ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the
	sysfs "set" command.  In each of these cases, we completely free
	the resource list first.

    IORESOURCE_DISABLED
	In addition to the cases where we used to set this flag, ISAPNP now
	adds an IORESOURCE_DISABLED resource when it reads a configuration
	register with a "disabled" value.

	[Rene, I made isapnp_set_resources() skip IORESOURCE_DISABLED
	resources, because that's effectively what we used to do.  I
	think it *ought* to work to write zero (or 4 for DMA) back to
	a configuration register to disable it, and that might even be
	useful as a way to manually disable a single resource, but for
	now it seems safer to preserve the previous behavior.]

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

---
 drivers/pnp/base.h        |   18 ---
 drivers/pnp/core.c        |   25 +++--
 drivers/pnp/interface.c   |   60 +++++-------
 drivers/pnp/isapnp/core.c |    8 -
 drivers/pnp/manager.c     |  218 +++++++++++-----------------------------------
 drivers/pnp/quirks.c      |    3 
 drivers/pnp/resource.c    |   86 +++---------------
 drivers/pnp/support.c     |   68 +++++---------
 drivers/pnp/system.c      |    8 -
 include/linux/pnp.h       |    5 -
 10 files changed, 150 insertions(+), 349 deletions(-)

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-05 16:09:47.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 16:09:51.000000000 -0600
@@ -45,27 +45,15 @@ int pnp_check_dma(struct pnp_dev *dev, s
 char *pnp_resource_type_name(struct resource *res);
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
-void pnp_init_resource(struct resource *res);
+void pnp_free_resources(struct pnp_dev *dev);
 int pnp_resource_type(struct resource *res);
 
-struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
-					  unsigned int type, unsigned int num);
-
-#define PNP_MAX_PORT		40
-#define PNP_MAX_MEM		24
-#define PNP_MAX_IRQ		 2
-#define PNP_MAX_DMA		 2
-
 struct pnp_resource {
+	struct list_head list;
 	struct resource res;
 };
 
-struct pnp_resource_table {
-	struct pnp_resource port[PNP_MAX_PORT];
-	struct pnp_resource mem[PNP_MAX_MEM];
-	struct pnp_resource dma[PNP_MAX_DMA];
-	struct pnp_resource irq[PNP_MAX_IRQ];
-};
+void pnp_free_resource(struct pnp_resource *pnp_res);
 
 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
 					  int flags);
Index: work10/drivers/pnp/core.c
===================================================================
--- work10.orig/drivers/pnp/core.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/core.c	2008-05-05 16:09:51.000000000 -0600
@@ -99,6 +99,21 @@ static void pnp_free_ids(struct pnp_dev 
 	}
 }
 
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+	list_del(&pnp_res->list);
+	kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res, *tmp;
+
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		pnp_free_resource(pnp_res);
+	}
+}
+
 static void pnp_release_device(struct device *dmdev)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
@@ -106,7 +121,7 @@ static void pnp_release_device(struct de
 	pnp_free_option(dev->independent);
 	pnp_free_option(dev->dependent);
 	pnp_free_ids(dev);
-	kfree(dev->res);
+	pnp_free_resources(dev);
 	kfree(dev);
 }
 
@@ -119,12 +134,7 @@ struct pnp_dev *pnp_alloc_dev(struct pnp
 	if (!dev)
 		return NULL;
 
-	dev->res = kzalloc(sizeof(struct pnp_resource_table), GFP_KERNEL);
-	if (!dev->res) {
-		kfree(dev);
-		return NULL;
-	}
-
+	INIT_LIST_HEAD(&dev->resources);
 	dev->protocol = protocol;
 	dev->number = id;
 	dev->dma_mask = DMA_24BIT_MASK;
@@ -140,7 +150,6 @@ struct pnp_dev *pnp_alloc_dev(struct pnp
 
 	dev_id = pnp_add_id(dev, pnpid);
 	if (!dev_id) {
-		kfree(dev->res);
 		kfree(dev);
 		return NULL;
 	}
Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 15:59:00.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 16:09:51.000000000 -0600
@@ -269,46 +269,38 @@ static ssize_t pnp_show_current_resource
 		pnp_printf(buffer, "disabled\n");
 
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "io");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " 0x%llx-0x%llx\n",
-					   (unsigned long long) res->start,
-					   (unsigned long long) res->end);
-		}
+		pnp_printf(buffer, "io");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "mem");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " 0x%llx-0x%llx\n",
-					   (unsigned long long) res->start,
-					   (unsigned long long) res->end);
-		}
+		pnp_printf(buffer, "mem");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "irq");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " %lld\n",
-					   (unsigned long long) res->start);
-		}
+		pnp_printf(buffer, "irq");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "dma");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " %lld\n",
-					   (unsigned long long) res->start);
-		}
+		pnp_printf(buffer, "dma");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
 	}
 	ret = (buffer->curr - buf);
 	kfree(buffer);
Index: work10/drivers/pnp/isapnp/core.c
===================================================================
--- work10.orig/drivers/pnp/isapnp/core.c	2008-05-05 16:09:19.000000000 -0600
+++ work10/drivers/pnp/isapnp/core.c	2008-05-05 16:10:24.000000000 -0600
@@ -973,8 +973,7 @@ static int isapnp_set_resources(struct p
 	dev->active = 1;
 	for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set io  %d to %#llx\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
@@ -983,8 +982,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			int irq = res->start;
 			if (irq == 2)
 				irq = 9;
@@ -994,8 +992,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set dma %d to %lld\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
@@ -1003,8 +1000,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set mem %d to %#llx\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
Index: work10/drivers/pnp/manager.c
===================================================================
--- work10.orig/drivers/pnp/manager.c	2008-05-05 15:59:00.000000000 -0600
+++ work10/drivers/pnp/manager.c	2008-05-05 16:09:51.000000000 -0600
@@ -19,40 +19,30 @@ DEFINE_MUTEX(pnp_res_mutex);
 
 static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many I/O port resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_IO, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  io %d already set to %#llx-%#llx "
 			"flags %#lx\n", idx, (unsigned long long) res->start,
 			(unsigned long long) res->end, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_IO;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
 
 	if (!rule->size) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  io %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	res->start = rule->min;
 	res->end = res->start + rule->size - 1;
 
-	/* run through until pnp_check_port is happy */
 	while (!pnp_check_port(dev, res)) {
 		res->start += rule->align;
 		res->end = res->start + rule->size - 1;
@@ -61,38 +51,29 @@ static int pnp_assign_port(struct pnp_de
 			return 0;
 		}
 	}
-	dev_dbg(&dev->dev, "  assign io  %d %#llx-%#llx\n", idx,
-		(unsigned long long) res->start, (unsigned long long) res->end);
+
+__add:
+	pnp_add_io_resource(dev, res->start, res->end, res->flags);
 	return 1;
 }
 
 static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
-
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many memory resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
+	struct resource *res, local_res;
 
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_MEM, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  mem %d already set to %#llx-%#llx "
 			"flags %#lx\n", idx, (unsigned long long) res->start,
 			(unsigned long long) res->end, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_MEM;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
 
-	/* convert pnp flags to standard Linux flags */
 	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
 		res->flags |= IORESOURCE_READONLY;
 	if (rule->flags & IORESOURCE_MEM_CACHEABLE)
@@ -105,13 +86,12 @@ static int pnp_assign_mem(struct pnp_dev
 	if (!rule->size) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  mem %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	res->start = rule->min;
 	res->end = res->start + rule->size - 1;
 
-	/* run through until pnp_check_mem is happy */
 	while (!pnp_check_mem(dev, res)) {
 		res->start += rule->align;
 		res->end = res->start + rule->size - 1;
@@ -120,15 +100,15 @@ static int pnp_assign_mem(struct pnp_dev
 			return 0;
 		}
 	}
-	dev_dbg(&dev->dev, "  assign mem %d %#llx-%#llx\n", idx,
-		(unsigned long long) res->start, (unsigned long long) res->end);
+
+__add:
+	pnp_add_mem_resource(dev, res->start, res->end, res->flags);
 	return 1;
 }
 
 static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 	int i;
 
 	/* IRQ priority: this table is good for i386 */
@@ -136,58 +116,48 @@ static int pnp_assign_irq(struct pnp_dev
 		5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
 	};
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many IRQ resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_IRQ, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  irq %d already set to %d flags %#lx\n",
 			idx, (int) res->start, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_IRQ;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
 
 	if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  irq %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	/* TBD: need check for >16 IRQ */
 	res->start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
 	if (res->start < PNP_IRQ_NR) {
 		res->end = res->start;
-		dev_dbg(&dev->dev, "  assign irq %d %d\n", idx,
-			(int) res->start);
-		return 1;
+		goto __add;
 	}
 	for (i = 0; i < 16; i++) {
 		if (test_bit(xtab[i], rule->map)) {
 			res->start = res->end = xtab[i];
-			if (pnp_check_irq(dev, res)) {
-				dev_dbg(&dev->dev, "  assign irq %d %d\n", idx,
-					(int) res->start);
-				return 1;
-			}
+			if (pnp_check_irq(dev, res))
+				goto __add;
 		}
 	}
 	dev_dbg(&dev->dev, "  couldn't assign irq %d\n", idx);
 	return 0;
+
+__add:
+	pnp_add_irq_resource(dev, res->start, res->flags);
+	return 1;
 }
 
 static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 	int i;
 
 	/* DMA priority: this table is good for i386 */
@@ -195,127 +165,47 @@ static void pnp_assign_dma(struct pnp_de
 		1, 3, 5, 6, 7, 0, 2, 4
 	};
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many DMA resources\n");
-		return;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_DMA, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  dma %d already set to %d flags %#lx\n",
 			idx, (int) res->start, res->flags);
 		return;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_DMA;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
 
 	for (i = 0; i < 8; i++) {
 		if (rule->map & (1 << xtab[i])) {
 			res->start = res->end = xtab[i];
-			if (pnp_check_dma(dev, res)) {
-				dev_dbg(&dev->dev, "  assign dma %d %d\n", idx,
-					(int) res->start);
-				return;
-			}
+			if (pnp_check_dma(dev, res))
+				goto __add;
 		}
 	}
 #ifdef MAX_DMA_CHANNELS
 	res->start = res->end = MAX_DMA_CHANNELS;
 #endif
-	res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
+	res->flags |= IORESOURCE_DISABLED;
 	dev_dbg(&dev->dev, "  disable dma %d\n", idx);
-}
 
-void pnp_init_resource(struct resource *res)
-{
-	unsigned long type;
-
-	type = res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
-			     IORESOURCE_IRQ | IORESOURCE_DMA);
-
-	res->name = NULL;
-	res->flags = type | IORESOURCE_AUTO | IORESOURCE_UNSET;
-	if (type == IORESOURCE_IRQ || type == IORESOURCE_DMA) {
-		res->start = -1;
-		res->end = -1;
-	} else {
-		res->start = 0;
-		res->end = 0;
-	}
+__add:
+	pnp_add_dma_resource(dev, res->start, res->flags);
 }
 
-/**
- * pnp_init_resources - Resets a resource table to default values.
- * @table: pointer to the desired resource table
- */
 void pnp_init_resources(struct pnp_dev *dev)
 {
-	struct resource *res;
-	int idx;
-
-	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
-		res = &dev->res->irq[idx].res;
-		res->flags = IORESOURCE_IRQ;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
-		res = &dev->res->dma[idx].res;
-		res->flags = IORESOURCE_DMA;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
-		res = &dev->res->port[idx].res;
-		res->flags = IORESOURCE_IO;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
-		res = &dev->res->mem[idx].res;
-		res->flags = IORESOURCE_MEM;
-		pnp_init_resource(res);
-	}
+	pnp_free_resources(dev);
 }
 
-/**
- * pnp_clean_resources - clears resources that were not manually set
- * @res: the resources to clean
- */
 static void pnp_clean_resource_table(struct pnp_dev *dev)
 {
-	struct resource *res;
-	int idx;
+	struct pnp_resource *pnp_res, *tmp;
 
-	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
-		res = &dev->res->irq[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_IRQ;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
-		res = &dev->res->dma[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_DMA;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
-		res = &dev->res->port[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_IO;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
-		res = &dev->res->mem[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_MEM;
-			pnp_init_resource(res);
-		}
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		if (pnp_res->res.flags & IORESOURCE_AUTO)
+			pnp_free_resource(pnp_res);
 	}
 }
 
Index: work10/drivers/pnp/quirks.c
===================================================================
--- work10.orig/drivers/pnp/quirks.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/quirks.c	2008-05-05 16:09:51.000000000 -0600
@@ -141,8 +141,7 @@ static void quirk_system_pci_resources(s
 			for (j = 0;
 			     (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
 			     j++) {
-				if (res->flags & IORESOURCE_UNSET ||
-				    (res->start == 0 && res->end == 0))
+				if (res->start == 0 && res->end == 0)
 					continue;
 
 				pnp_start = res->start;
Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-05 16:09:46.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 16:09:51.000000000 -0600
@@ -237,7 +237,7 @@ void pnp_free_option(struct pnp_option *
 	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
 
 #define cannot_compare(flags) \
-((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
+((flags) & IORESOURCE_DISABLED)
 
 int pnp_check_port(struct pnp_dev *dev, struct resource *res)
 {
@@ -505,81 +505,31 @@ int pnp_resource_type(struct resource *r
 			     IORESOURCE_IRQ | IORESOURCE_DMA);
 }
 
-struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
-					  unsigned int type, unsigned int num)
-{
-	struct pnp_resource_table *res = dev->res;
-
-	switch (type) {
-	case IORESOURCE_IO:
-		if (num >= PNP_MAX_PORT)
-			return NULL;
-		return &res->port[num];
-	case IORESOURCE_MEM:
-		if (num >= PNP_MAX_MEM)
-			return NULL;
-		return &res->mem[num];
-	case IORESOURCE_IRQ:
-		if (num >= PNP_MAX_IRQ)
-			return NULL;
-		return &res->irq[num];
-	case IORESOURCE_DMA:
-		if (num >= PNP_MAX_DMA)
-			return NULL;
-		return &res->dma[num];
-	}
-	return NULL;
-}
-
 struct resource *pnp_get_resource(struct pnp_dev *dev,
 				  unsigned int type, unsigned int num)
 {
 	struct pnp_resource *pnp_res;
+	struct resource *res;
 
-	pnp_res = pnp_get_pnp_resource(dev, type, num);
-	if (pnp_res)
-		return &pnp_res->res;
-
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (pnp_resource_type(res) == type && num-- == 0)
+			return res;
+	}
 	return NULL;
 }
 EXPORT_SYMBOL(pnp_get_resource);
 
-static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)
+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
 {
 	struct pnp_resource *pnp_res;
-	int i;
 
-	switch (type) {
-	case IORESOURCE_IO:
-		for (i = 0; i < PNP_MAX_PORT; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_MEM:
-		for (i = 0; i < PNP_MAX_MEM; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_IRQ:
-		for (i = 0; i < PNP_MAX_IRQ; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_DMA:
-		for (i = 0; i < PNP_MAX_DMA; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	}
-	return NULL;
+	pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
+	if (!pnp_res)
+		return NULL;
+
+	list_add_tail(&pnp_res->list, &dev->resources);
+	return pnp_res;
 }
 
 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
@@ -589,7 +539,7 @@ struct pnp_resource *pnp_add_irq_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_IRQ);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for IRQ %d\n",
@@ -615,7 +565,7 @@ struct pnp_resource *pnp_add_dma_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_DMA);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for DMA %d\n",
@@ -642,7 +592,7 @@ struct pnp_resource *pnp_add_io_resource
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_IO);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for IO "
@@ -671,7 +621,7 @@ struct pnp_resource *pnp_add_mem_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_MEM);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for MEM "
Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-05 16:09:47.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 16:09:51.000000000 -0600
@@ -70,54 +70,34 @@ char *pnp_resource_type_name(struct reso
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
 {
 #ifdef DEBUG
+	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int i;
 
 	dev_dbg(&dev->dev, "current resources: %s\n", desc);
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
 
-	for (i = 0; i < PNP_MAX_IRQ; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_IRQ, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  irq %lld flags %#lx%s%s\n",
-				(unsigned long long) res->start, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_DMA; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_DMA, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  dma %lld flags %#lx%s%s\n",
-				(unsigned long long) res->start, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_PORT; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_IO, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx"
-				"%s%s\n",
-				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_MEM; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx"
-				"%s%s\n",
-				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
+		dev_dbg(&dev->dev, "  %-3s ", pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
+			printk("disabled\n");
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+			printk("%#llx-%#llx flags %#lx",
+			       (unsigned long long) res->start,
+			       (unsigned long long) res->end, res->flags);
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
+			printk("%lld flags %#lx",
+			       (unsigned long long) res->start, res->flags);
+			break;
+		}
+		printk("\n");
 	}
 #endif
 }
Index: work10/drivers/pnp/system.c
===================================================================
--- work10.orig/drivers/pnp/system.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/system.c	2008-05-05 16:09:51.000000000 -0600
@@ -60,8 +60,6 @@ static void reserve_resources_of_dev(str
 	int i;
 
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		if (res->flags & IORESOURCE_UNSET)
-			continue;
 		if (res->start == 0)
 			continue;	/* disabled */
 		if (res->start < 0x100)
@@ -80,12 +78,8 @@ static void reserve_resources_of_dev(str
 		reserve_range(dev, res->start, res->end, 1);
 	}
 
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		if (res->flags & IORESOURCE_UNSET)
-			continue;
-
+	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++)
 		reserve_range(dev, res->start, res->end, 0);
-	}
 }
 
 static int system_pnp_probe(struct pnp_dev *dev,
Index: work10/include/linux/pnp.h
===================================================================
--- work10.orig/include/linux/pnp.h	2008-05-05 15:58:46.000000000 -0600
+++ work10/include/linux/pnp.h	2008-05-05 16:09:51.000000000 -0600
@@ -15,7 +15,6 @@
 
 struct pnp_protocol;
 struct pnp_dev;
-struct pnp_resource_table;
 
 /*
  * Resource Management
@@ -24,7 +23,7 @@ struct resource *pnp_get_resource(struct
 
 static inline int pnp_resource_valid(struct resource *res)
 {
-	if (res && !(res->flags & IORESOURCE_UNSET))
+	if (res)
 		return 1;
 	return 0;
 }
@@ -248,7 +247,7 @@ struct pnp_dev {
 	int capabilities;
 	struct pnp_option *independent;
 	struct pnp_option *dependent;
-	struct pnp_resource_table *res;
+	struct list_head resources;
 
 	char name[PNP_NAME_LEN];	/* contains a human-readable name */
 	int flags;			/* used by protocols */

-- 

[patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Bjorn Helgaas]

[-- Attachment #1: pnp-convert-to-lists --]
[-- Type: text/plain, Size: 30529 bytes --]

PNP used to have a fixed-size pnp_resource_table for tracking the
resources used by a device.  This table often overflowed, so we've
had to increase the table size, which wastes memory because most
devices have very few resources.

This patch replaces the table with a linked list of resources where
the entries are allocated on demand.

This removes messages like these:

    pnpacpi: exceeded the max number of IO resources
    00:01: too many I/O port resources

References:

    http://bugzilla.kernel.org/show_bug.cgi?id=9535
    http://bugzilla.kernel.org/show_bug.cgi?id=9740
    http://lkml.org/lkml/2007/11/30/110

This patch also changes the way PNP uses the IORESOURCE_UNSET,
IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.

Prior to this patch, the pnp_resource_table entries used the flags
like this:

    IORESOURCE_UNSET
	This table entry is unused and available for use.  When this flag
	is set, we shouldn't look at anything else in the resource structure.
	This flag is set when a resource table entry is initialized.

    IORESOURCE_AUTO
	This resource was assigned automatically by pnp_assign_{io,mem,etc}().

	This flag is set when a resource table entry is initialized and
	cleared whenever we discover a resource setting by reading an ISAPNP
	config register, parsing a PNPBIOS resource data stream, parsing an
	ACPI _CRS list, or interpreting a sysfs "set" command.

	Resources marked IORESOURCE_AUTO are reinitialized and marked as
	IORESOURCE_UNSET by pnp_clean_resource_table() in these cases:

	    - before we attempt to assign resources automatically,
	    - if we fail to assign resources automatically,
	    - after disabling a device

    IORESOURCE_DISABLED
	Set by pnp_assign_{io,mem,etc}() when automatic assignment fails.
	Also set by PNPBIOS and PNPACPI for:

	    - invalid IRQs or GSI registration failures
	    - invalid DMA channels
	    - I/O ports above 0x10000
	    - mem ranges with negative length

After this patch, there is no pnp_resource_table, and the resource list
entries use the flags like this:

    IORESOURCE_UNSET
	This flag is no longer used in PNP.  Instead of keeping
	IORESOURCE_UNSET entries in the resource list, we remove
	entries from the list and free them.

    IORESOURCE_AUTO
	No change in meaning: it still means the resource was assigned
	automatically by pnp_assign_{port,mem,etc}(), but these functions
	now set the bit explicitly.

	We still "clean" a device's resource list in the same places,
	but rather than reinitializing IORESOURCE_AUTO entries, we
	just remove them from the list.

	Note that IORESOURCE_AUTO entries are always at the end of the
	list, so removing them doesn't reorder other list entries.
	This is because non-IORESOURCE_AUTO entries are added by the
	ISAPNP, PNPBIOS, or PNPACPI "get resources" methods and by the
	sysfs "set" command.  In each of these cases, we completely free
	the resource list first.

    IORESOURCE_DISABLED
	In addition to the cases where we used to set this flag, ISAPNP now
	adds an IORESOURCE_DISABLED resource when it reads a configuration
	register with a "disabled" value.

	[Rene, I made isapnp_set_resources() skip IORESOURCE_DISABLED
	resources, because that's effectively what we used to do.  I
	think it *ought* to work to write zero (or 4 for DMA) back to
	a configuration register to disable it, and that might even be
	useful as a way to manually disable a single resource, but for
	now it seems safer to preserve the previous behavior.]

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

---
 drivers/pnp/base.h        |   18 ---
 drivers/pnp/core.c        |   25 +++--
 drivers/pnp/interface.c   |   60 +++++-------
 drivers/pnp/isapnp/core.c |    8 -
 drivers/pnp/manager.c     |  218 +++++++++++-----------------------------------
 drivers/pnp/quirks.c      |    3 
 drivers/pnp/resource.c    |   86 +++---------------
 drivers/pnp/support.c     |   68 +++++---------
 drivers/pnp/system.c      |    8 -
 include/linux/pnp.h       |    5 -
 10 files changed, 150 insertions(+), 349 deletions(-)

Index: work10/drivers/pnp/base.h
===================================================================
--- work10.orig/drivers/pnp/base.h	2008-05-05 16:09:47.000000000 -0600
+++ work10/drivers/pnp/base.h	2008-05-05 16:09:51.000000000 -0600
@@ -45,27 +45,15 @@ int pnp_check_dma(struct pnp_dev *dev, s
 char *pnp_resource_type_name(struct resource *res);
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
 
-void pnp_init_resource(struct resource *res);
+void pnp_free_resources(struct pnp_dev *dev);
 int pnp_resource_type(struct resource *res);
 
-struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
-					  unsigned int type, unsigned int num);
-
-#define PNP_MAX_PORT		40
-#define PNP_MAX_MEM		24
-#define PNP_MAX_IRQ		 2
-#define PNP_MAX_DMA		 2
-
 struct pnp_resource {
+	struct list_head list;
 	struct resource res;
 };
 
-struct pnp_resource_table {
-	struct pnp_resource port[PNP_MAX_PORT];
-	struct pnp_resource mem[PNP_MAX_MEM];
-	struct pnp_resource dma[PNP_MAX_DMA];
-	struct pnp_resource irq[PNP_MAX_IRQ];
-};
+void pnp_free_resource(struct pnp_resource *pnp_res);
 
 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
 					  int flags);
Index: work10/drivers/pnp/core.c
===================================================================
--- work10.orig/drivers/pnp/core.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/core.c	2008-05-05 16:09:51.000000000 -0600
@@ -99,6 +99,21 @@ static void pnp_free_ids(struct pnp_dev 
 	}
 }
 
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+	list_del(&pnp_res->list);
+	kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+	struct pnp_resource *pnp_res, *tmp;
+
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		pnp_free_resource(pnp_res);
+	}
+}
+
 static void pnp_release_device(struct device *dmdev)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
@@ -106,7 +121,7 @@ static void pnp_release_device(struct de
 	pnp_free_option(dev->independent);
 	pnp_free_option(dev->dependent);
 	pnp_free_ids(dev);
-	kfree(dev->res);
+	pnp_free_resources(dev);
 	kfree(dev);
 }
 
@@ -119,12 +134,7 @@ struct pnp_dev *pnp_alloc_dev(struct pnp
 	if (!dev)
 		return NULL;
 
-	dev->res = kzalloc(sizeof(struct pnp_resource_table), GFP_KERNEL);
-	if (!dev->res) {
-		kfree(dev);
-		return NULL;
-	}
-
+	INIT_LIST_HEAD(&dev->resources);
 	dev->protocol = protocol;
 	dev->number = id;
 	dev->dma_mask = DMA_24BIT_MASK;
@@ -140,7 +150,6 @@ struct pnp_dev *pnp_alloc_dev(struct pnp
 
 	dev_id = pnp_add_id(dev, pnpid);
 	if (!dev_id) {
-		kfree(dev->res);
 		kfree(dev);
 		return NULL;
 	}
Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 15:59:00.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 16:09:51.000000000 -0600
@@ -269,46 +269,38 @@ static ssize_t pnp_show_current_resource
 		pnp_printf(buffer, "disabled\n");
 
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "io");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " 0x%llx-0x%llx\n",
-					   (unsigned long long) res->start,
-					   (unsigned long long) res->end);
-		}
+		pnp_printf(buffer, "io");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "mem");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " 0x%llx-0x%llx\n",
-					   (unsigned long long) res->start,
-					   (unsigned long long) res->end);
-		}
+		pnp_printf(buffer, "mem");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+				   (unsigned long long) res->start,
+				   (unsigned long long) res->end);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "irq");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " %lld\n",
-					   (unsigned long long) res->start);
-		}
+		pnp_printf(buffer, "irq");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
 	}
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
-		if (pnp_resource_valid(res)) {
-			pnp_printf(buffer, "dma");
-			if (res->flags & IORESOURCE_DISABLED)
-				pnp_printf(buffer, " disabled\n");
-			else
-				pnp_printf(buffer, " %lld\n",
-					   (unsigned long long) res->start);
-		}
+		pnp_printf(buffer, "dma");
+		if (res->flags & IORESOURCE_DISABLED)
+			pnp_printf(buffer, " disabled\n");
+		else
+			pnp_printf(buffer, " %lld\n",
+				   (unsigned long long) res->start);
 	}
 	ret = (buffer->curr - buf);
 	kfree(buffer);
Index: work10/drivers/pnp/isapnp/core.c
===================================================================
--- work10.orig/drivers/pnp/isapnp/core.c	2008-05-05 16:09:19.000000000 -0600
+++ work10/drivers/pnp/isapnp/core.c	2008-05-05 16:10:24.000000000 -0600
@@ -973,8 +973,7 @@ static int isapnp_set_resources(struct p
 	dev->active = 1;
 	for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set io  %d to %#llx\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
@@ -983,8 +982,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			int irq = res->start;
 			if (irq == 2)
 				irq = 9;
@@ -994,8 +992,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set dma %d to %lld\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
@@ -1003,8 +1000,7 @@ static int isapnp_set_resources(struct p
 	}
 	for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
 		res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
-		if (res && pnp_resource_valid(res) &&
-		    !(res->flags & IORESOURCE_DISABLED)) {
+		if (res && !(res->flags & IORESOURCE_DISABLED)) {
 			dev_dbg(&dev->dev, "  set mem %d to %#llx\n",
 				tmp, (unsigned long long) res->start);
 			isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
Index: work10/drivers/pnp/manager.c
===================================================================
--- work10.orig/drivers/pnp/manager.c	2008-05-05 15:59:00.000000000 -0600
+++ work10/drivers/pnp/manager.c	2008-05-05 16:09:51.000000000 -0600
@@ -19,40 +19,30 @@ DEFINE_MUTEX(pnp_res_mutex);
 
 static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many I/O port resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_IO, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  io %d already set to %#llx-%#llx "
 			"flags %#lx\n", idx, (unsigned long long) res->start,
 			(unsigned long long) res->end, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_IO;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
 
 	if (!rule->size) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  io %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	res->start = rule->min;
 	res->end = res->start + rule->size - 1;
 
-	/* run through until pnp_check_port is happy */
 	while (!pnp_check_port(dev, res)) {
 		res->start += rule->align;
 		res->end = res->start + rule->size - 1;
@@ -61,38 +51,29 @@ static int pnp_assign_port(struct pnp_de
 			return 0;
 		}
 	}
-	dev_dbg(&dev->dev, "  assign io  %d %#llx-%#llx\n", idx,
-		(unsigned long long) res->start, (unsigned long long) res->end);
+
+__add:
+	pnp_add_io_resource(dev, res->start, res->end, res->flags);
 	return 1;
 }
 
 static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
-
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many memory resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
+	struct resource *res, local_res;
 
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_MEM, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  mem %d already set to %#llx-%#llx "
 			"flags %#lx\n", idx, (unsigned long long) res->start,
 			(unsigned long long) res->end, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_MEM;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = 0;
+	res->end = 0;
 
-	/* convert pnp flags to standard Linux flags */
 	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
 		res->flags |= IORESOURCE_READONLY;
 	if (rule->flags & IORESOURCE_MEM_CACHEABLE)
@@ -105,13 +86,12 @@ static int pnp_assign_mem(struct pnp_dev
 	if (!rule->size) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  mem %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	res->start = rule->min;
 	res->end = res->start + rule->size - 1;
 
-	/* run through until pnp_check_mem is happy */
 	while (!pnp_check_mem(dev, res)) {
 		res->start += rule->align;
 		res->end = res->start + rule->size - 1;
@@ -120,15 +100,15 @@ static int pnp_assign_mem(struct pnp_dev
 			return 0;
 		}
 	}
-	dev_dbg(&dev->dev, "  assign mem %d %#llx-%#llx\n", idx,
-		(unsigned long long) res->start, (unsigned long long) res->end);
+
+__add:
+	pnp_add_mem_resource(dev, res->start, res->end, res->flags);
 	return 1;
 }
 
 static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 	int i;
 
 	/* IRQ priority: this table is good for i386 */
@@ -136,58 +116,48 @@ static int pnp_assign_irq(struct pnp_dev
 		5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
 	};
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many IRQ resources\n");
-		/* pretend we were successful so at least the manager won't try again */
-		return 1;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_IRQ, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  irq %d already set to %d flags %#lx\n",
 			idx, (int) res->start, res->flags);
 		return 1;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_IRQ;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
 
 	if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
 		res->flags |= IORESOURCE_DISABLED;
 		dev_dbg(&dev->dev, "  irq %d disabled\n", idx);
-		return 1;	/* skip disabled resource requests */
+		goto __add;
 	}
 
 	/* TBD: need check for >16 IRQ */
 	res->start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
 	if (res->start < PNP_IRQ_NR) {
 		res->end = res->start;
-		dev_dbg(&dev->dev, "  assign irq %d %d\n", idx,
-			(int) res->start);
-		return 1;
+		goto __add;
 	}
 	for (i = 0; i < 16; i++) {
 		if (test_bit(xtab[i], rule->map)) {
 			res->start = res->end = xtab[i];
-			if (pnp_check_irq(dev, res)) {
-				dev_dbg(&dev->dev, "  assign irq %d %d\n", idx,
-					(int) res->start);
-				return 1;
-			}
+			if (pnp_check_irq(dev, res))
+				goto __add;
 		}
 	}
 	dev_dbg(&dev->dev, "  couldn't assign irq %d\n", idx);
 	return 0;
+
+__add:
+	pnp_add_irq_resource(dev, res->start, res->flags);
+	return 1;
 }
 
 static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
 {
-	struct pnp_resource *pnp_res;
-	struct resource *res;
+	struct resource *res, local_res;
 	int i;
 
 	/* DMA priority: this table is good for i386 */
@@ -195,127 +165,47 @@ static void pnp_assign_dma(struct pnp_de
 		1, 3, 5, 6, 7, 0, 2, 4
 	};
 
-	pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, idx);
-	if (!pnp_res) {
-		dev_err(&dev->dev, "too many DMA resources\n");
-		return;
-	}
-
-	res = &pnp_res->res;
-
-	/* check if this resource has been manually set, if so skip */
-	if (!(res->flags & IORESOURCE_AUTO)) {
+	res = pnp_get_resource(dev, IORESOURCE_DMA, idx);
+	if (res) {
 		dev_dbg(&dev->dev, "  dma %d already set to %d flags %#lx\n",
 			idx, (int) res->start, res->flags);
 		return;
 	}
 
-	/* set the initial values */
-	res->flags |= rule->flags | IORESOURCE_DMA;
-	res->flags &= ~IORESOURCE_UNSET;
+	res = &local_res;
+	res->flags = rule->flags | IORESOURCE_AUTO;
+	res->start = -1;
+	res->end = -1;
 
 	for (i = 0; i < 8; i++) {
 		if (rule->map & (1 << xtab[i])) {
 			res->start = res->end = xtab[i];
-			if (pnp_check_dma(dev, res)) {
-				dev_dbg(&dev->dev, "  assign dma %d %d\n", idx,
-					(int) res->start);
-				return;
-			}
+			if (pnp_check_dma(dev, res))
+				goto __add;
 		}
 	}
 #ifdef MAX_DMA_CHANNELS
 	res->start = res->end = MAX_DMA_CHANNELS;
 #endif
-	res->flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
+	res->flags |= IORESOURCE_DISABLED;
 	dev_dbg(&dev->dev, "  disable dma %d\n", idx);
-}
 
-void pnp_init_resource(struct resource *res)
-{
-	unsigned long type;
-
-	type = res->flags & (IORESOURCE_IO  | IORESOURCE_MEM |
-			     IORESOURCE_IRQ | IORESOURCE_DMA);
-
-	res->name = NULL;
-	res->flags = type | IORESOURCE_AUTO | IORESOURCE_UNSET;
-	if (type == IORESOURCE_IRQ || type == IORESOURCE_DMA) {
-		res->start = -1;
-		res->end = -1;
-	} else {
-		res->start = 0;
-		res->end = 0;
-	}
+__add:
+	pnp_add_dma_resource(dev, res->start, res->flags);
 }
 
-/**
- * pnp_init_resources - Resets a resource table to default values.
- * @table: pointer to the desired resource table
- */
 void pnp_init_resources(struct pnp_dev *dev)
 {
-	struct resource *res;
-	int idx;
-
-	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
-		res = &dev->res->irq[idx].res;
-		res->flags = IORESOURCE_IRQ;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
-		res = &dev->res->dma[idx].res;
-		res->flags = IORESOURCE_DMA;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
-		res = &dev->res->port[idx].res;
-		res->flags = IORESOURCE_IO;
-		pnp_init_resource(res);
-	}
-	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
-		res = &dev->res->mem[idx].res;
-		res->flags = IORESOURCE_MEM;
-		pnp_init_resource(res);
-	}
+	pnp_free_resources(dev);
 }
 
-/**
- * pnp_clean_resources - clears resources that were not manually set
- * @res: the resources to clean
- */
 static void pnp_clean_resource_table(struct pnp_dev *dev)
 {
-	struct resource *res;
-	int idx;
+	struct pnp_resource *pnp_res, *tmp;
 
-	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
-		res = &dev->res->irq[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_IRQ;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
-		res = &dev->res->dma[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_DMA;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
-		res = &dev->res->port[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_IO;
-			pnp_init_resource(res);
-		}
-	}
-	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
-		res = &dev->res->mem[idx].res;
-		if (res->flags & IORESOURCE_AUTO) {
-			res->flags = IORESOURCE_MEM;
-			pnp_init_resource(res);
-		}
+	list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+		if (pnp_res->res.flags & IORESOURCE_AUTO)
+			pnp_free_resource(pnp_res);
 	}
 }
 
Index: work10/drivers/pnp/quirks.c
===================================================================
--- work10.orig/drivers/pnp/quirks.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/quirks.c	2008-05-05 16:09:51.000000000 -0600
@@ -141,8 +141,7 @@ static void quirk_system_pci_resources(s
 			for (j = 0;
 			     (res = pnp_get_resource(dev, IORESOURCE_MEM, j));
 			     j++) {
-				if (res->flags & IORESOURCE_UNSET ||
-				    (res->start == 0 && res->end == 0))
+				if (res->start == 0 && res->end == 0)
 					continue;
 
 				pnp_start = res->start;
Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-05 16:09:46.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 16:09:51.000000000 -0600
@@ -237,7 +237,7 @@ void pnp_free_option(struct pnp_option *
 	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
 
 #define cannot_compare(flags) \
-((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
+((flags) & IORESOURCE_DISABLED)
 
 int pnp_check_port(struct pnp_dev *dev, struct resource *res)
 {
@@ -505,81 +505,31 @@ int pnp_resource_type(struct resource *r
 			     IORESOURCE_IRQ | IORESOURCE_DMA);
 }
 
-struct pnp_resource *pnp_get_pnp_resource(struct pnp_dev *dev,
-					  unsigned int type, unsigned int num)
-{
-	struct pnp_resource_table *res = dev->res;
-
-	switch (type) {
-	case IORESOURCE_IO:
-		if (num >= PNP_MAX_PORT)
-			return NULL;
-		return &res->port[num];
-	case IORESOURCE_MEM:
-		if (num >= PNP_MAX_MEM)
-			return NULL;
-		return &res->mem[num];
-	case IORESOURCE_IRQ:
-		if (num >= PNP_MAX_IRQ)
-			return NULL;
-		return &res->irq[num];
-	case IORESOURCE_DMA:
-		if (num >= PNP_MAX_DMA)
-			return NULL;
-		return &res->dma[num];
-	}
-	return NULL;
-}
-
 struct resource *pnp_get_resource(struct pnp_dev *dev,
 				  unsigned int type, unsigned int num)
 {
 	struct pnp_resource *pnp_res;
+	struct resource *res;
 
-	pnp_res = pnp_get_pnp_resource(dev, type, num);
-	if (pnp_res)
-		return &pnp_res->res;
-
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+		if (pnp_resource_type(res) == type && num-- == 0)
+			return res;
+	}
 	return NULL;
 }
 EXPORT_SYMBOL(pnp_get_resource);
 
-static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev, int type)
+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
 {
 	struct pnp_resource *pnp_res;
-	int i;
 
-	switch (type) {
-	case IORESOURCE_IO:
-		for (i = 0; i < PNP_MAX_PORT; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IO, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_MEM:
-		for (i = 0; i < PNP_MAX_MEM; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_MEM, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_IRQ:
-		for (i = 0; i < PNP_MAX_IRQ; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_IRQ, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	case IORESOURCE_DMA:
-		for (i = 0; i < PNP_MAX_DMA; i++) {
-			pnp_res = pnp_get_pnp_resource(dev, IORESOURCE_DMA, i);
-			if (pnp_res && !pnp_resource_valid(&pnp_res->res))
-				return pnp_res;
-		}
-		break;
-	}
-	return NULL;
+	pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
+	if (!pnp_res)
+		return NULL;
+
+	list_add_tail(&pnp_res->list, &dev->resources);
+	return pnp_res;
 }
 
 struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
@@ -589,7 +539,7 @@ struct pnp_resource *pnp_add_irq_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_IRQ);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for IRQ %d\n",
@@ -615,7 +565,7 @@ struct pnp_resource *pnp_add_dma_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_DMA);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for DMA %d\n",
@@ -642,7 +592,7 @@ struct pnp_resource *pnp_add_io_resource
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_IO);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for IO "
@@ -671,7 +621,7 @@ struct pnp_resource *pnp_add_mem_resourc
 	struct resource *res;
 	static unsigned char warned;
 
-	pnp_res = pnp_new_resource(dev, IORESOURCE_MEM);
+	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
 		if (!warned) {
 			dev_err(&dev->dev, "can't add resource for MEM "
Index: work10/drivers/pnp/support.c
===================================================================
--- work10.orig/drivers/pnp/support.c	2008-05-05 16:09:47.000000000 -0600
+++ work10/drivers/pnp/support.c	2008-05-05 16:09:51.000000000 -0600
@@ -70,54 +70,34 @@ char *pnp_resource_type_name(struct reso
 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
 {
 #ifdef DEBUG
+	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int i;
 
 	dev_dbg(&dev->dev, "current resources: %s\n", desc);
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
 
-	for (i = 0; i < PNP_MAX_IRQ; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_IRQ, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  irq %lld flags %#lx%s%s\n",
-				(unsigned long long) res->start, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_DMA; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_DMA, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  dma %lld flags %#lx%s%s\n",
-				(unsigned long long) res->start, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_PORT; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_IO, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  io  %#llx-%#llx flags %#lx"
-				"%s%s\n",
-				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
-	}
-	for (i = 0; i < PNP_MAX_MEM; i++) {
-		res = pnp_get_resource(dev, IORESOURCE_MEM, i);
-		if (res && !(res->flags & IORESOURCE_UNSET))
-			dev_dbg(&dev->dev, "  mem %#llx-%#llx flags %#lx"
-				"%s%s\n",
-				(unsigned long long) res->start,
-				(unsigned long long) res->end, res->flags,
-				res->flags & IORESOURCE_DISABLED ?
-					" DISABLED" : "",
-				res->flags & IORESOURCE_AUTO ?
-					" AUTO" : "");
+		dev_dbg(&dev->dev, "  %-3s ", pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
+			printk("disabled\n");
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+			printk("%#llx-%#llx flags %#lx",
+			       (unsigned long long) res->start,
+			       (unsigned long long) res->end, res->flags);
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
+			printk("%lld flags %#lx",
+			       (unsigned long long) res->start, res->flags);
+			break;
+		}
+		printk("\n");
 	}
 #endif
 }
Index: work10/drivers/pnp/system.c
===================================================================
--- work10.orig/drivers/pnp/system.c	2008-05-05 15:58:46.000000000 -0600
+++ work10/drivers/pnp/system.c	2008-05-05 16:09:51.000000000 -0600
@@ -60,8 +60,6 @@ static void reserve_resources_of_dev(str
 	int i;
 
 	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		if (res->flags & IORESOURCE_UNSET)
-			continue;
 		if (res->start == 0)
 			continue;	/* disabled */
 		if (res->start < 0x100)
@@ -80,12 +78,8 @@ static void reserve_resources_of_dev(str
 		reserve_range(dev, res->start, res->end, 1);
 	}
 
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		if (res->flags & IORESOURCE_UNSET)
-			continue;
-
+	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++)
 		reserve_range(dev, res->start, res->end, 0);
-	}
 }
 
 static int system_pnp_probe(struct pnp_dev *dev,
Index: work10/include/linux/pnp.h
===================================================================
--- work10.orig/include/linux/pnp.h	2008-05-05 15:58:46.000000000 -0600
+++ work10/include/linux/pnp.h	2008-05-05 16:09:51.000000000 -0600
@@ -15,7 +15,6 @@
 
 struct pnp_protocol;
 struct pnp_dev;
-struct pnp_resource_table;
 
 /*
  * Resource Management
@@ -24,7 +23,7 @@ struct resource *pnp_get_resource(struct
 
 static inline int pnp_resource_valid(struct resource *res)
 {
-	if (res && !(res->flags & IORESOURCE_UNSET))
+	if (res)
 		return 1;
 	return 0;
 }
@@ -248,7 +247,7 @@ struct pnp_dev {
 	int capabilities;
 	struct pnp_option *independent;
 	struct pnp_option *dependent;
-	struct pnp_resource_table *res;
+	struct list_head resources;
 
 	char name[PNP_NAME_LEN];	/* contains a human-readable name */
 	int flags;			/* used by protocols */

-- 

Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Andrew Morton]

On Mon, 05 May 2008 16:36:36 -0600 Bjorn Helgaas <bjorn.helgaas@hp.com> wrote:

> PNP used to have a fixed-size pnp_resource_table for tracking the
> resources used by a device.  This table often overflowed, so we've
> had to increase the table size, which wastes memory because most
> devices have very few resources.
> 
> This patch replaces the table with a linked list of resources where
> the entries are allocated on demand.
> 
> This removes messages like these:
> 
>     pnpacpi: exceeded the max number of IO resources
>     00:01: too many I/O port resources
> 
> References:
> 
>     http://bugzilla.kernel.org/show_bug.cgi?id=9535
>     http://bugzilla.kernel.org/show_bug.cgi?id=9740
>     http://lkml.org/lkml/2007/11/30/110
> 
> This patch also changes the way PNP uses the IORESOURCE_UNSET,
> IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.

This patch kills my prehistoric dual PIII.

http://userweb.kernel.org/~akpm/p5135912.jpg
http://userweb.kernel.org/~akpm/config-vmm.txt
http://userweb.kernel.org/~akpm/dmesg-vmm.txt

Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Bjorn Helgaas]

On Tuesday 13 May 2008 08:42:41 pm Andrew Morton wrote:
> On Mon, 05 May 2008 16:36:36 -0600 Bjorn Helgaas <bjorn.helgaas@hp.com> wrote:
> 
> > PNP used to have a fixed-size pnp_resource_table for tracking the
> > resources used by a device.  This table often overflowed, so we've
> > had to increase the table size, which wastes memory because most
> > devices have very few resources.
> > 
> > This patch replaces the table with a linked list of resources where
> > the entries are allocated on demand.
> > 
> > This removes messages like these:
> > 
> >     pnpacpi: exceeded the max number of IO resources
> >     00:01: too many I/O port resources
> > 
> > References:
> > 
> >     http://bugzilla.kernel.org/show_bug.cgi?id=9535
> >     http://bugzilla.kernel.org/show_bug.cgi?id=9740
> >     http://lkml.org/lkml/2007/11/30/110
> > 
> > This patch also changes the way PNP uses the IORESOURCE_UNSET,
> > IORESOURCE_AUTO, and IORESOURCE_DISABLED flags.
> 
> This patch kills my prehistoric dual PIII.
> 
> http://userweb.kernel.org/~akpm/p5135912.jpg
> http://userweb.kernel.org/~akpm/config-vmm.txt
> http://userweb.kernel.org/~akpm/dmesg-vmm.txt

Thanks for the report.  I think I've fixed the problem.  You had
to remove the following three patches:

  pnp-replace-pnp_resource_table-with-dynamically-allocated-resources.patch
  pnp-remove-ratelimit-on-add-resource-failures.patch
  pnp-dont-sort-by-type-in-sys-resources.patch

I'll post a new set of four patches (I added one patch to fix this
problem) to replace those.  They should go at the same point in the
series as the three you removed.

Bjorn

Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Rene Herman]

On 15-05-08 01:18, Bjorn Helgaas wrote:

> Thanks for the report.  I think I've fixed the problem.

I saw it was PnPBIOS by the way. PnPBIOS appears to be obsolete these 
days; do you have machines to test it on yourself? I do (plenty), so 
although I'm not being fast with testing anyway, would you want me to 
switch those from PnPACPI to PnPBIOS?

Rene.

Re: [patch 6/8] PNP: replace pnp_resource_table with dynamically allocated resources

[Bjorn Helgaas]

On Thursday 15 May 2008 01:54:42 am Rene Herman wrote:
> On 15-05-08 01:18, Bjorn Helgaas wrote:
> 
> > Thanks for the report.  I think I've fixed the problem.
> 
> I saw it was PnPBIOS by the way. PnPBIOS appears to be obsolete these 
> days; do you have machines to test it on yourself? I do (plenty), so 
> although I'm not being fast with testing anyway, would you want me to 
> switch those from PnPACPI to PnPBIOS?

All of my machines have ACPI, but in this case, I was able to
reproduce the null pointer dereference Andrew by booting with
"pnpacpi=off".

PNPBIOS testing is pretty scarce, though, so anything you
do along those lines would be much appreciated.

Bjorn

[patch 7/8] PNP: remove ratelimit on add resource failures

[Bjorn Helgaas]

[-- Attachment #1: pnp-remove-warning-ratelimit --]
[-- Type: text/plain, Size: 2527 bytes --]

We used to have a fixed-size resource table.  If a device had
twenty resources when the table only had space for ten, we didn't
need ten warnings, so we added the ratelimit.

Now that we can dynamically allocate new resources, we should
only get failures if the allocation fails.  That should be
rare enough that we don't need to ratelimit the messages.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-05 11:38:16.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 11:49:05.000000000 -0600
@@ -537,15 +537,10 @@ struct pnp_resource *pnp_add_irq_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for IRQ %d\n",
-				irq);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
 		return NULL;
 	}
 
@@ -563,15 +558,10 @@ struct pnp_resource *pnp_add_dma_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for DMA %d\n",
-				dma);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
 		return NULL;
 	}
 
@@ -590,16 +580,12 @@ struct pnp_resource *pnp_add_io_resource
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for IO "
-				"%#llx-%#llx\n",(unsigned long long) start,
-				(unsigned long long) end);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
 		return NULL;
 	}
 
@@ -619,16 +605,12 @@ struct pnp_resource *pnp_add_mem_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	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;
-		}
+		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
 		return NULL;
 	}
 

-- 

[patch 7/8] PNP: remove ratelimit on add resource failures

[Bjorn Helgaas]

[-- Attachment #1: pnp-remove-warning-ratelimit --]
[-- Type: text/plain, Size: 2527 bytes --]

We used to have a fixed-size resource table.  If a device had
twenty resources when the table only had space for ten, we didn't
need ten warnings, so we added the ratelimit.

Now that we can dynamically allocate new resources, we should
only get failures if the allocation fails.  That should be
rare enough that we don't need to ratelimit the messages.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/resource.c
===================================================================
--- work10.orig/drivers/pnp/resource.c	2008-05-05 11:38:16.000000000 -0600
+++ work10/drivers/pnp/resource.c	2008-05-05 11:49:05.000000000 -0600
@@ -537,15 +537,10 @@ struct pnp_resource *pnp_add_irq_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for IRQ %d\n",
-				irq);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
 		return NULL;
 	}
 
@@ -563,15 +558,10 @@ struct pnp_resource *pnp_add_dma_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for DMA %d\n",
-				dma);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
 		return NULL;
 	}
 
@@ -590,16 +580,12 @@ struct pnp_resource *pnp_add_io_resource
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	if (!pnp_res) {
-		if (!warned) {
-			dev_err(&dev->dev, "can't add resource for IO "
-				"%#llx-%#llx\n",(unsigned long long) start,
-				(unsigned long long) end);
-			warned = 1;
-		}
+		dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
 		return NULL;
 	}
 
@@ -619,16 +605,12 @@ struct pnp_resource *pnp_add_mem_resourc
 {
 	struct pnp_resource *pnp_res;
 	struct resource *res;
-	static unsigned char warned;
 
 	pnp_res = pnp_new_resource(dev);
 	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;
-		}
+		dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
+			(unsigned long long) start,
+			(unsigned long long) end);
 		return NULL;
 	}
 

-- 

[patch 8/8] PNP: dont sort by type in /sys/.../resources

[Bjorn Helgaas]

[-- Attachment #1: pnp-unsort-sysfs-resources --]
[-- Type: text/plain, Size: 3075 bytes --]

Rather than stepping through all IO resources, then stepping through
all MMIO resources, etc., we can just iterate over the resource list
once directly.

This can change the order in /sys, e.g.,

    # cat /sys/devices/pnp0/00:07/resources     # OLD
    state = active
    io 0x3f8-0x3ff
    irq 4

    # cat /sys/devices/pnp0/00:07/resources     # NEW
    state = active
    irq 4
    io 0x3f8-0x3ff

The old code artificially sorted resources by type; the new code
just lists them in the order we read them from the ISAPNP hardware
or the BIOS.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 11:54:26.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 11:59:53.000000000 -0600
@@ -248,8 +248,9 @@ static ssize_t pnp_show_current_resource
 					  char *buf)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int i, ret;
+	int ret;
 	pnp_info_buffer_t *buffer;
 
 	if (!dev)
@@ -262,46 +263,33 @@ static ssize_t pnp_show_current_resource
 	buffer->buffer = buf;
 	buffer->curr = buffer->buffer;
 
-	pnp_printf(buffer, "state = ");
-	if (dev->active)
-		pnp_printf(buffer, "active\n");
-	else
-		pnp_printf(buffer, "disabled\n");
-
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		pnp_printf(buffer, "io");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " 0x%llx-0x%llx\n",
-				   (unsigned long long) res->start,
-				   (unsigned long long) res->end);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		pnp_printf(buffer, "mem");
-		if (res->flags & IORESOURCE_DISABLED)
+	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+
+		pnp_printf(buffer, pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
 			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+			pnp_printf(buffer, " %#llx-%#llx\n",
 				   (unsigned long long) res->start,
 				   (unsigned long long) res->end);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
-		pnp_printf(buffer, "irq");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " %lld\n",
-				   (unsigned long long) res->start);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
-		pnp_printf(buffer, "dma");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
 			pnp_printf(buffer, " %lld\n",
 				   (unsigned long long) res->start);
+			break;
+		}
 	}
+
 	ret = (buffer->curr - buf);
 	kfree(buffer);
 	return ret;

-- 

[patch 8/8] PNP: dont sort by type in /sys/.../resources

[Bjorn Helgaas]

[-- Attachment #1: pnp-unsort-sysfs-resources --]
[-- Type: text/plain, Size: 3075 bytes --]

Rather than stepping through all IO resources, then stepping through
all MMIO resources, etc., we can just iterate over the resource list
once directly.

This can change the order in /sys, e.g.,

    # cat /sys/devices/pnp0/00:07/resources     # OLD
    state = active
    io 0x3f8-0x3ff
    irq 4

    # cat /sys/devices/pnp0/00:07/resources     # NEW
    state = active
    irq 4
    io 0x3f8-0x3ff

The old code artificially sorted resources by type; the new code
just lists them in the order we read them from the ISAPNP hardware
or the BIOS.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>

Index: work10/drivers/pnp/interface.c
===================================================================
--- work10.orig/drivers/pnp/interface.c	2008-05-05 11:54:26.000000000 -0600
+++ work10/drivers/pnp/interface.c	2008-05-05 11:59:53.000000000 -0600
@@ -248,8 +248,9 @@ static ssize_t pnp_show_current_resource
 					  char *buf)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
+	struct pnp_resource *pnp_res;
 	struct resource *res;
-	int i, ret;
+	int ret;
 	pnp_info_buffer_t *buffer;
 
 	if (!dev)
@@ -262,46 +263,33 @@ static ssize_t pnp_show_current_resource
 	buffer->buffer = buf;
 	buffer->curr = buffer->buffer;
 
-	pnp_printf(buffer, "state = ");
-	if (dev->active)
-		pnp_printf(buffer, "active\n");
-	else
-		pnp_printf(buffer, "disabled\n");
-
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
-		pnp_printf(buffer, "io");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " 0x%llx-0x%llx\n",
-				   (unsigned long long) res->start,
-				   (unsigned long long) res->end);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
-		pnp_printf(buffer, "mem");
-		if (res->flags & IORESOURCE_DISABLED)
+	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+	list_for_each_entry(pnp_res, &dev->resources, list) {
+		res = &pnp_res->res;
+
+		pnp_printf(buffer, pnp_resource_type_name(res));
+
+		if (res->flags & IORESOURCE_DISABLED) {
 			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " 0x%llx-0x%llx\n",
+			continue;
+		}
+
+		switch (pnp_resource_type(res)) {
+		case IORESOURCE_IO:
+		case IORESOURCE_MEM:
+			pnp_printf(buffer, " %#llx-%#llx\n",
 				   (unsigned long long) res->start,
 				   (unsigned long long) res->end);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
-		pnp_printf(buffer, "irq");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
-			pnp_printf(buffer, " %lld\n",
-				   (unsigned long long) res->start);
-	}
-	for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
-		pnp_printf(buffer, "dma");
-		if (res->flags & IORESOURCE_DISABLED)
-			pnp_printf(buffer, " disabled\n");
-		else
+			break;
+		case IORESOURCE_IRQ:
+		case IORESOURCE_DMA:
 			pnp_printf(buffer, " %lld\n",
 				   (unsigned long long) res->start);
+			break;
+		}
 	}
+
 	ret = (buffer->curr - buf);
 	kfree(buffer);
 	return ret;

--