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Subject[patch 02/28] PNP: remove pnp_resource.index
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 2008-05-15 15:22:36.000000000 -0600
+++ work10/drivers/pnp/base.h 2008-05-15 15:23:24.000000000 -0600
@@ -57,7 +57,6 @@ 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 2008-05-15 15:22:36.000000000 -0600
+++ work10/drivers/pnp/interface.c 2008-05-15 15:23:24.000000000 -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 2008-05-15 15:21:53.000000000 -0600
+++ work10/drivers/pnp/isapnp/core.c 2008-05-15 15:23:24.000000000 -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 2008-05-15 15:21:53.000000000 -0600
+++ work10/drivers/pnp/manager.c 2008-05-15 15:23:24.000000000 -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;

--


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