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PNP: reduce redundancy in pnp_check_port() and others 

Use a temporary "res" pointer to replace repeated lookups in
the pnp resource tables.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Acked-By: Rene Herman <rene.herman@gmail.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2008-04-28 16:34:19 -06:00 committed by Len Brown
parent 28ccffcf02
commit 30c016a0c8
1 changed files with 54 additions and 38 deletions
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92
drivers/pnp/resource.c
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@ -243,13 +243,15 @@ int pnp_check_port(struct pnp_dev *dev, int idx)
{
int i;
struct pnp_dev *tdev;
struct resource *res, *tres;
resource_size_t *port, *end, *tport, *tend;
port = &dev->res.port_resource[idx].start;
end = &dev->res.port_resource[idx].end;
res = &dev->res.port_resource[idx];
port = &res->start;
end = &res->end;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.port_resource[idx].flags))
if (cannot_compare(res->flags))
return 1;
/* check if the resource is already in use, skip if the
@ -269,9 +271,10 @@ int pnp_check_port(struct pnp_dev *dev, int idx)
/* check for internal conflicts */
for (i = 0; i < PNP_MAX_PORT && i != idx; i++) {
if (dev->res.port_resource[i].flags & IORESOURCE_IO) {
tport = &dev->res.port_resource[i].start;
tend = &dev->res.port_resource[i].end;
tres = &dev->res.port_resource[i];
if (tres->flags & IORESOURCE_IO) {
tport = &tres->start;
tend = &tres->end;
if (ranged_conflict(port, end, tport, tend))
return 0;
}
@ -282,12 +285,12 @@ int pnp_check_port(struct pnp_dev *dev, int idx)
if (tdev == dev)
continue;
for (i = 0; i < PNP_MAX_PORT; i++) {
if (tdev->res.port_resource[i].flags & IORESOURCE_IO) {
if (cannot_compare
(tdev->res.port_resource[i].flags))
tres = &tdev->res.port_resource[i];
if (tres->flags & IORESOURCE_IO) {
if (cannot_compare(tres->flags))
continue;
tport = &tdev->res.port_resource[i].start;
tend = &tdev->res.port_resource[i].end;
tport = &tres->start;
tend = &tres->end;
if (ranged_conflict(port, end, tport, tend))
return 0;
}
@ -301,13 +304,15 @@ int pnp_check_mem(struct pnp_dev *dev, int idx)
{
int i;
struct pnp_dev *tdev;
struct resource *res, *tres;
resource_size_t *addr, *end, *taddr, *tend;
addr = &dev->res.mem_resource[idx].start;
end = &dev->res.mem_resource[idx].end;
res = &dev->res.mem_resource[idx];
addr = &res->start;
end = &res->end;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.mem_resource[idx].flags))
if (cannot_compare(res->flags))
return 1;
/* check if the resource is already in use, skip if the
@ -327,9 +332,10 @@ int pnp_check_mem(struct pnp_dev *dev, int idx)
/* check for internal conflicts */
for (i = 0; i < PNP_MAX_MEM && i != idx; i++) {
if (dev->res.mem_resource[i].flags & IORESOURCE_MEM) {
taddr = &dev->res.mem_resource[i].start;
tend = &dev->res.mem_resource[i].end;
tres = &dev->res.mem_resource[i];
if (tres->flags & IORESOURCE_MEM) {
taddr = &tres->start;
tend = &tres->end;
if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
@ -340,12 +346,12 @@ int pnp_check_mem(struct pnp_dev *dev, int idx)
if (tdev == dev)
continue;
for (i = 0; i < PNP_MAX_MEM; i++) {
if (tdev->res.mem_resource[i].flags & IORESOURCE_MEM) {
if (cannot_compare
(tdev->res.mem_resource[i].flags))
tres = &tdev->res.mem_resource[i];
if (tres->flags & IORESOURCE_MEM) {
if (cannot_compare(tres->flags))
continue;
taddr = &tdev->res.mem_resource[i].start;
tend = &tdev->res.mem_resource[i].end;
taddr = &tres->start;
tend = &tres->end;
if (ranged_conflict(addr, end, taddr, tend))
return 0;
}
@ -364,10 +370,14 @@ int pnp_check_irq(struct pnp_dev *dev, int idx)
{
int i;
struct pnp_dev *tdev;
resource_size_t *irq = &dev->res.irq_resource[idx].start;
struct resource *res, *tres;
resource_size_t *irq;
res = &dev->res.irq_resource[idx];
irq = &res->start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.irq_resource[idx].flags))
if (cannot_compare(res->flags))
return 1;
/* check if the resource is valid */
@ -382,8 +392,9 @@ int pnp_check_irq(struct pnp_dev *dev, int idx)
/* check for internal conflicts */
for (i = 0; i < PNP_MAX_IRQ && i != idx; i++) {
if (dev->res.irq_resource[i].flags & IORESOURCE_IRQ) {
if (dev->res.irq_resource[i].start == *irq)
tres = &dev->res.irq_resource[i];
if (tres->flags & IORESOURCE_IRQ) {
if (tres->start == *irq)
return 0;
}
}
@ -415,11 +426,11 @@ int pnp_check_irq(struct pnp_dev *dev, int idx)
if (tdev == dev)
continue;
for (i = 0; i < PNP_MAX_IRQ; i++) {
if (tdev->res.irq_resource[i].flags & IORESOURCE_IRQ) {
if (cannot_compare
(tdev->res.irq_resource[i].flags))
tres = &tdev->res.irq_resource[i];
if (tres->flags & IORESOURCE_IRQ) {
if (cannot_compare(tres->flags))
continue;
if ((tdev->res.irq_resource[i].start == *irq))
if (tres->start == *irq)
return 0;
}
}
@ -433,10 +444,14 @@ int pnp_check_dma(struct pnp_dev *dev, int idx)
#ifndef CONFIG_IA64
int i;
struct pnp_dev *tdev;
resource_size_t *dma = &dev->res.dma_resource[idx].start;
struct resource *res, *tres;
resource_size_t *dma;
res = &dev->res.dma_resource[idx];
dma = &res->start;
/* if the resource doesn't exist, don't complain about it */
if (cannot_compare(dev->res.dma_resource[idx].flags))
if (cannot_compare(res->flags))
return 1;
/* check if the resource is valid */
@ -451,8 +466,9 @@ int pnp_check_dma(struct pnp_dev *dev, int idx)
/* check for internal conflicts */
for (i = 0; i < PNP_MAX_DMA && i != idx; i++) {
if (dev->res.dma_resource[i].flags & IORESOURCE_DMA) {
if (dev->res.dma_resource[i].start == *dma)
tres = &dev->res.dma_resource[i];
if (tres->flags & IORESOURCE_DMA) {
if (tres->start == *dma)
return 0;
}
}
@ -470,11 +486,11 @@ int pnp_check_dma(struct pnp_dev *dev, int idx)
if (tdev == dev)
continue;
for (i = 0; i < PNP_MAX_DMA; i++) {
if (tdev->res.dma_resource[i].flags & IORESOURCE_DMA) {
if (cannot_compare
(tdev->res.dma_resource[i].flags))
tres = &tdev->res.dma_resource[i];
if (tres->flags & IORESOURCE_DMA) {
if (cannot_compare(tres->flags))
continue;
if ((tdev->res.dma_resource[i].start == *dma))
if (tres->start == *dma)
return 0;
}
}