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[PATCH] hpet: use HPET physical addresses for dup. detection

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- Use HPET physical address to detect duplicates, not logical addresses.
  Using logical (mapped) addresses fails to detect duplicates
  because ioremap() returns a new mapped address each time.

- iounmap() regions when duplicate/busy areas are found.

Signed-off-by: Randy Dunlap <randy_d_dunlap@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Randy Dunlap 2005-10-30 15:03:43 -08:00 committed by Linus Torvalds
parent 757c472409
commit b6ab126211
1 changed files with 15 additions and 5 deletions
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20
drivers/char/hpet.c
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@ -809,8 +809,11 @@ int hpet_alloc(struct hpet_data *hdp)
* ACPI also reports hpet, then we catch it here.
*/
for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
if (hpetp->hp_hpet == hdp->hd_address)
if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
printk(KERN_DEBUG "%s: duplicate HPET ignored\n",
__FUNCTION__);
return 0;
}
siz = sizeof(struct hpets) + ((hdp->hd_nirqs - 1) *
sizeof(struct hpet_dev));
@ -858,8 +861,8 @@ int hpet_alloc(struct hpet_data *hdp)
do_div(temp, period);
hpetp->hp_tick_freq = temp; /* ticks per second */
printk(KERN_INFO "hpet%d: at MMIO 0x%lx, IRQ%s",
hpetp->hp_which, hdp->hd_phys_address,
printk(KERN_INFO "hpet%d: at MMIO 0x%lx (virtual 0x%p), IRQ%s",
hpetp->hp_which, hdp->hd_phys_address, hdp->hd_address,
hpetp->hp_ntimer > 1 ? "s" : "");
for (i = 0; i < hpetp->hp_ntimer; i++)
printk("%s %d", i > 0 ? "," : "", hdp->hd_irq[i]);
@ -922,8 +925,12 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
hdp->hd_address = ioremap(addr.min_address_range, size);
for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
if (hpetp->hp_hpet == hdp->hd_address)
if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
printk(KERN_DEBUG "%s: 0x%lx is busy\n",
__FUNCTION__, hdp->hd_phys_address);
iounmap(hdp->hd_address);
return -EBUSY;
}
} else if (res->id == ACPI_RSTYPE_FIXED_MEM32) {
struct acpi_resource_fixed_mem32 *fixmem32;
@ -936,7 +943,10 @@ static acpi_status hpet_resources(struct acpi_resource *res, void *data)
HPET_RANGE_SIZE);
for (hpetp = hpets; hpetp; hpetp = hpetp->hp_next)
if (hpetp->hp_hpet == hdp->hd_address) {
if (hpetp->hp_hpet_phys == hdp->hd_phys_address) {
printk(KERN_DEBUG "%s: 0x%lx is busy\n",
__FUNCTION__, hdp->hd_phys_address);
iounmap(hdp->hd_address);
return -EBUSY;
}
} else if (res->id == ACPI_RSTYPE_EXT_IRQ) {