From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] 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@xxxxxxxxx>
---
drivers/ide/ide-acpi.c | 14 ++-----
drivers/ide/ide-iops.c | 15 +++----
drivers/ide/ide-probe.c | 96 +++++++++++++++++++-----------------------------
drivers/ide/ide-proc.c | 7 +--
drivers/ide/ide.c | 5 +-
drivers/ide/scc_pata.c | 8 ++--
include/linux/ide.h | 11 ++++-
7 files changed, 69 insertions(+), 87 deletions(-)
Index: b/drivers/ide/ide-acpi.c
===================================================================
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -641,7 +641,8 @@ void ide_acpi_push_timing(ide_hwif_t *hw
*/
void ide_acpi_set_state(ide_hwif_t *hwif, int on)
{
- int unit;
+ ide_drive_t *drive;
+ int i;
if (ide_noacpi || ide_noacpi_psx)
return;
@@ -655,9 +656,8 @@ void ide_acpi_set_state(ide_hwif_t *hwif
/* channel first and then drives for power on and verse versa for power off */
if (on)
acpi_bus_set_power(hwif->acpidata->obj_handle, ACPI_STATE_D0);
- for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = hwif->devices[unit];
+ ide_port_for_each_dev(i, drive, hwif) {
if (!drive->acpidata->obj_handle)
drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive);
@@ -717,9 +717,7 @@ void ide_acpi_port_init_devices(ide_hwif
/*
* Send IDENTIFY for each drive
*/
- for (i = 0; i < MAX_DRIVES; i++) {
- drive = hwif->devices[i];
-
+ ide_port_for_each_dev(i, drive, hwif) {
memset(drive->acpidata, 0, sizeof(*drive->acpidata));
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
@@ -744,9 +742,7 @@ void ide_acpi_port_init_devices(ide_hwif
ide_acpi_get_timing(hwif);
ide_acpi_push_timing(hwif);
- for (i = 0; i < MAX_DRIVES; i++) {
- drive = hwif->devices[i];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if (drive->dev_flags & IDE_DFLAG_PRESENT)
/* Execute ACPI startup code */
ide_acpi_exec_tfs(drive);
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -1081,8 +1081,9 @@ static ide_startstop_t do_reset1 (ide_dr
struct ide_io_ports *io_ports = &hwif->io_ports;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
const struct ide_port_ops *port_ops;
+ ide_drive_t *tdrive;
unsigned long flags, timeout;
- unsigned int unit;
+ int i;
DEFINE_WAIT(wait);
spin_lock_irqsave(&hwif->lock, flags);
@@ -1110,11 +1111,9 @@ static ide_startstop_t do_reset1 (ide_dr
prepare_to_wait(&ide_park_wq, &wait, TASK_UNINTERRUPTIBLE);
timeout = jiffies;
- for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *tdrive = hwif->devices[unit];
-
- if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
- tdrive->dev_flags & IDE_DFLAG_PARKED &&
+ ide_port_for_each_dev(i, tdrive, hwif) {
+ if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
+ tdrive->dev_flags & IDE_DFLAG_PARKED &&
time_after(tdrive->sleep, timeout))
timeout = tdrive->sleep;
}
@@ -1133,8 +1132,8 @@ static ide_startstop_t do_reset1 (ide_dr
* First, reset any device state data we were maintaining
* for any of the drives on this interface.
*/
- for (unit = 0; unit < MAX_DRIVES; ++unit)
- pre_reset(hwif->devices[unit]);
+ ide_port_for_each_dev(i, tdrive, hwif)
+ pre_reset(tdrive);
if (io_ports->ctl_addr == 0) {
spin_unlock_irqrestore(&hwif->lock, flags);
Index: b/drivers/ide/ide-probe.c
===================================================================
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -697,7 +697,8 @@ out:
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 @@ static int ide_port_wait_ready(ide_hwif_
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 @@ static int ide_port_wait_ready(ide_hwif_
}
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 @@ EXPORT_SYMBOL_GPL(ide_undecoded_slave);
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 @@ static int ide_probe_port(ide_hwif_t *hw
* 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 int ide_probe_port(ide_hwif_t *hw
static void ide_port_tune_devices(ide_hwif_t *hwif)
{
const struct ide_port_ops *port_ops = hwif->port_ops;
- int unit;
-
- for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = hwif->devices[unit];
+ ide_drive_t *drive;
+ int i;
+ 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 @@ static void ide_port_tune_devices(ide_hw
}
}
- 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 DEFINE_MUTEX(ide_cfg_mtx);
*/
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 @@ out:
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 hwif_register_devices(ide_hw
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 const u8 ide_hwif_to_major[] =
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_free_port_slot(int idx)
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 @@ int ide_host_register(struct ide_host *h
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 @@ int ide_host_register(struct ide_host *h
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 @@ int ide_host_register(struct ide_host *h
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 @@ int ide_host_register(struct ide_host *h
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 @@ int ide_host_register(struct ide_host *h
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 @@ EXPORT_SYMBOL_GPL(ide_host_add);
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 @@ void ide_host_free(struct ide_host *host
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 @@ EXPORT_SYMBOL_GPL(ide_host_free);
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);
Index: b/drivers/ide/ide-proc.c
===================================================================
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -593,14 +593,13 @@ EXPORT_SYMBOL(ide_proc_unregister_driver
void ide_proc_port_register_devices(ide_hwif_t *hwif)
{
- int d;
struct proc_dir_entry *ent;
struct proc_dir_entry *parent = hwif->proc;
+ ide_drive_t *drive;
char name[64];
+ int i;
- for (d = 0; d < MAX_DRIVES; d++) {
- ide_drive_t *drive = hwif->devices[d];
-
+ ide_port_for_each_dev(i, drive, hwif) {
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0 || drive->proc)
continue;
Index: b/drivers/ide/ide.c
===================================================================
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -488,6 +488,7 @@ MODULE_PARM_DESC(ignore_cable, "ignore c
void ide_port_apply_params(ide_hwif_t *hwif)
{
+ ide_drive_t *drive;
int i;
if (ide_ignore_cable & (1 << hwif->index)) {
@@ -496,8 +497,8 @@ void ide_port_apply_params(ide_hwif_t *h
hwif->cbl = ATA_CBL_PATA40_SHORT;
}
- for (i = 0; i < MAX_DRIVES; i++)
- ide_dev_apply_params(hwif->devices[i], i);
+ ide_port_for_each_dev(i, drive, hwif)
+ ide_dev_apply_params(drive, i);
}
/*
Index: b/drivers/ide/scc_pata.c
===================================================================
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -406,17 +406,17 @@ static int scc_dma_end(ide_drive_t *driv
data_loss = 1;
if (retry++) {
struct request *rq = hwif->rq;
- int unit;
+ ide_drive_t *drive;
+ int i;
+
/* ERROR_RESET and drive->crc_count are needed
* to reduce DMA transfer mode in retry process.
*/
if (rq)
rq->errors |= ERROR_RESET;
- for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = hwif->devices[unit];
+ ide_port_for_each_dev(i, drive, hwif)
drive->crc_count++;
- }
}
}
}
Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -753,7 +753,7 @@ typedef struct hwif_s {
unsigned long sata_scr[SATA_NR_PORTS];
- ide_drive_t *devices[MAX_DRIVES];
+ ide_drive_t *devices[MAX_DRIVES + 1];
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
@@ -860,7 +860,7 @@ typedef struct hwif_s {
#define MAX_HOST_PORTS 4
struct ide_host {
- ide_hwif_t *ports[MAX_HOST_PORTS];
+ ide_hwif_t *ports[MAX_HOST_PORTS + 1];
unsigned int n_ports;
struct device *dev[2];
unsigned int (*init_chipset)(struct pci_dev *);
@@ -1603,4 +1603,11 @@ static inline ide_drive_t *ide_get_pair_
return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
}
+
+#define ide_port_for_each_dev(i, dev, port) \
+ for ((i) = 0; ((dev) = (port)->devices[i]) || (i) < MAX_DRIVES; (i)++)
+
+#define ide_host_for_each_port(i, port, host) \
+ for ((i) = 0; ((port) = (host)->ports[i]) || (i) < MAX_HOST_PORTS; (i)++)
+
#endif /* _IDE_H */
--
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