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PNP: dont sort by type in /sys/.../resources

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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>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Bjorn Helgaas 2008-06-27 16:57:00 -06:00 committed by Andi Kleen
parent 25d39c39d8
commit f61ed7e32d
1 changed files with 22 additions and 34 deletions
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56
drivers/pnp/interface.c
View file

@ -248,8 +248,9 @@ static ssize_t pnp_show_current_resources(struct device *dmdev,
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_resources(struct device *dmdev,
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");
pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
pnp_printf(buffer, "io");
if (res->flags & IORESOURCE_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_MEM, i)); i++) {
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++) {
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;