ide: add port and host iterators
Add ide_port_for_each_dev() / ide_host_for_each_port() iterators
and update IDE code to use them.
While at it:
- s/unit/i/ variable in ide_port_wait_ready(), ide_probe_port(),
ide_port_tune_devices(), ide_port_init_devices_data(), do_reset1(),
ide_acpi_set_state() and scc_dma_end()
- s/d/i/ variable in ide_proc_port_register_devices()
There should be no functional changes caused by this patch.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 006e601..e688ca1 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -697,7 +697,8 @@
static int ide_port_wait_ready(ide_hwif_t *hwif)
{
- int unit, rc;
+ ide_drive_t *drive;
+ int i, rc;
printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
@@ -714,9 +715,7 @@
return rc;
/* Now make sure both master & slave are ready */
- for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = hwif->devices[unit];
-
+ ide_port_for_each_dev(i, drive, hwif) {
/* Ignore disks that we will not probe for later. */
if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
(drive->dev_flags & IDE_DFLAG_PRESENT)) {
@@ -732,7 +731,7 @@
}
out:
/* Exit function with master reselected (let's be sane) */
- if (unit)
+ if (i)
SELECT_DRIVE(hwif->devices[0]);
return rc;
@@ -778,9 +777,10 @@
static int ide_probe_port(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
unsigned long flags;
unsigned int irqd;
- int unit, rc = -ENODEV;
+ int i, rc = -ENODEV;
BUG_ON(hwif->present);
@@ -806,9 +806,7 @@
* Second drive should only exist if first drive was found,
* but a lot of cdrom drives are configured as single slaves.
*/
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = hwif->devices[unit];
-
+ ide_port_for_each_dev(i, drive, hwif) {
(void) probe_for_drive(drive);
if (drive->dev_flags & IDE_DFLAG_PRESENT)
rc = 0;
@@ -829,20 +827,17 @@
static void ide_port_tune_devices(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
- int unit;
+ ide_drive_t *drive;
+ int i;
- for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = hwif->devices[unit];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
if (port_ops && port_ops->quirkproc)
port_ops->quirkproc(drive);
}
}
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = hwif->devices[unit];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
ide_set_max_pio(drive);
@@ -853,9 +848,7 @@
}
}
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = hwif->devices[unit];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||
drive->id[ATA_ID_DWORD_IO])
drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
@@ -927,12 +920,11 @@
*/
static int ide_port_setup_devices(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
int i, j = 0;
mutex_lock(&ide_cfg_mtx);
- for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = hwif->devices[i];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
continue;
@@ -1161,10 +1153,10 @@
static void hwif_register_devices(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
unsigned int i;
- for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = hwif->devices[i];
+ ide_port_for_each_dev(i, drive, hwif) {
struct device *dev = &drive->gendev;
int ret;
@@ -1187,11 +1179,10 @@
static void ide_port_init_devices(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
+ ide_drive_t *drive;
int i;
- for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = hwif->devices[i];
-
+ ide_port_for_each_dev(i, drive, hwif) {
drive->dn = i + hwif->channel * 2;
if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
@@ -1282,16 +1273,16 @@
static void ide_port_init_devices_data(ide_hwif_t *hwif)
{
- int unit;
+ ide_drive_t *drive;
+ int i;
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = hwif->devices[unit];
- u8 j = (hwif->index * MAX_DRIVES) + unit;
+ ide_port_for_each_dev(i, drive, hwif) {
+ u8 j = (hwif->index * MAX_DRIVES) + i;
memset(drive, 0, sizeof(*drive));
drive->media = ide_disk;
- drive->select = (unit << 4) | ATA_DEVICE_OBS;
+ drive->select = (i << 4) | ATA_DEVICE_OBS;
drive->hwif = hwif;
drive->ready_stat = ATA_DRDY;
drive->bad_wstat = BAD_W_STAT;
@@ -1387,10 +1378,11 @@
static void ide_port_free_devices(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
int i;
- for (i = 0; i < MAX_DRIVES; i++)
- kfree(hwif->devices[i]);
+ ide_port_for_each_dev(i, drive, hwif)
+ kfree(drive);
}
static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
@@ -1478,9 +1470,7 @@
ide_hwif_t *hwif, *mate = NULL;
int i, j = 0;
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL) {
mate = NULL;
continue;
@@ -1506,9 +1496,7 @@
ide_port_init_devices(hwif);
}
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
@@ -1523,9 +1511,7 @@
ide_port_tune_devices(hwif);
}
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
@@ -1550,9 +1536,7 @@
ide_acpi_port_init_devices(hwif);
}
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
@@ -1560,9 +1544,7 @@
hwif_register_devices(hwif);
}
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
@@ -1602,11 +1584,10 @@
static void __ide_port_unregister_devices(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
int i;
- for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = hwif->devices[i];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
device_unregister(&drive->gendev);
wait_for_completion(&drive->gendev_rel_comp);
@@ -1675,9 +1656,7 @@
ide_hwif_t *hwif;
int i;
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- hwif = host->ports[i];
-
+ ide_host_for_each_port(i, hwif, host) {
if (hwif == NULL)
continue;
@@ -1692,11 +1671,12 @@
void ide_host_remove(struct ide_host *host)
{
+ ide_hwif_t *hwif;
int i;
- for (i = 0; i < MAX_HOST_PORTS; i++) {
- if (host->ports[i])
- ide_unregister(host->ports[i]);
+ ide_host_for_each_port(i, hwif, host) {
+ if (hwif)
+ ide_unregister(hwif);
}
ide_host_free(host);