ide-4drives: manage I/O resources in driver
* Tell IDE layer to not manage resources by setting hwif->mmio flag.
* Use {request,release}_region() for resources management.
* Use driver name for resources management.
* Remove no longer needed 'hwif->chipset == ide_4drives' handling
from ide_device_add_all().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index d37a268..da6025c 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1530,8 +1530,7 @@
hwif = &ide_hwifs[idx[i]];
- if ((hwif->chipset != ide_4drives || !hwif->mate ||
- !hwif->mate->present) && ide_hwif_request_regions(hwif)) {
+ if (ide_hwif_request_regions(hwif)) {
printk(KERN_ERR "%s: ports already in use, "
"skipping probe\n", hwif->name);
continue;
diff --git a/drivers/ide/legacy/ide-4drives.c b/drivers/ide/legacy/ide-4drives.c
index c352f12..e695662 100644
--- a/drivers/ide/legacy/ide-4drives.c
+++ b/drivers/ide/legacy/ide-4drives.c
@@ -4,6 +4,8 @@
#include <linux/module.h>
#include <linux/ide.h>
+#define DRV_NAME "ide-4drives"
+
int probe_4drives;
module_param_named(probe, probe_4drives, bool, 0);
@@ -12,21 +14,36 @@
static int __init ide_4drives_init(void)
{
ide_hwif_t *hwif, *mate;
+ unsigned long base = 0x1f0, ctl = 0x3f6;
u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
hw_regs_t hw;
if (probe_4drives == 0)
return -ENODEV;
+ if (!request_region(base, 8, DRV_NAME)) {
+ printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
+ DRV_NAME, base, base + 7);
+ return -EBUSY;
+ }
+
+ if (!request_region(ctl, 1, DRV_NAME)) {
+ printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
+ DRV_NAME, ctl);
+ release_region(base, 8);
+ return -EBUSY;
+ }
+
memset(&hw, 0, sizeof(hw));
- ide_std_init_ports(&hw, 0x1f0, 0x3f6);
+ ide_std_init_ports(&hw, base, ctl);
hw.irq = 14;
hw.chipset = ide_4drives;
hwif = ide_find_port();
if (hwif) {
ide_init_port_hw(hwif, &hw);
+ hwif->mmio = 1;
idx[0] = hwif->index;
}
@@ -35,6 +52,7 @@
ide_init_port_hw(mate, &hw);
mate->drives[0].select.all ^= 0x20;
mate->drives[1].select.all ^= 0x20;
+ mate->mmio = 1;
idx[1] = mate->index;
if (hwif) {
