From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] ide: dynamic allocation of device structures
Allocate device structures dynamically instead of having them embedded
in ide_hwif_t:
* Remove needless zeroing of port structure from ide_init_port_data().
* Add ide_hwif_t.devices[MAX_DRIVES] (table of pointers to the devices).
* Add ide_port_{alloc,free}_devices() helpers and use them respectively
in ide_{host,free}_alloc().
* Convert all users of ->drives[] to use ->devices[] instead.
While at it:
* Use drive->dn for the slave device check in scc_pata.c.
As a nice side-effect this patch cuts ~1kB (x86-32) from the resulting
code size:
text data bss dec hex filename
53963 1244 237 55444 d894 drivers/ide/ide-core.o.before
52981 1244 237 54462 d4be drivers/ide/ide-core.o.after
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ide/ide-acpi.c | 10 +++---
drivers/ide/ide-iops.c | 4 +-
drivers/ide/ide-probe.c | 71 ++++++++++++++++++++++++++++++++++--------------
drivers/ide/ide-proc.c | 2 -
drivers/ide/ide.c | 2 -
drivers/ide/scc_pata.c | 5 ++-
include/linux/ide.h | 4 +-
7 files changed, 65 insertions(+), 33 deletions(-)
Index: b/drivers/ide/ide-acpi.c
===================================================================
--- a/drivers/ide/ide-acpi.c
+++ b/drivers/ide/ide-acpi.c
@@ -656,7 +656,7 @@ void ide_acpi_set_state(ide_hwif_t *hwif
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->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
if (!drive->acpidata->obj_handle)
drive->acpidata->obj_handle = ide_acpi_drive_get_handle(drive);
@@ -711,14 +711,14 @@ void ide_acpi_port_init_devices(ide_hwif
* for both drives, regardless whether they are connected
* or not.
*/
- hwif->drives[0].acpidata = &hwif->acpidata->master;
- hwif->drives[1].acpidata = &hwif->acpidata->slave;
+ hwif->devices[0]->acpidata = &hwif->acpidata->master;
+ hwif->devices[1]->acpidata = &hwif->acpidata->slave;
/*
* Send IDENTIFY for each drive
*/
for (i = 0; i < MAX_DRIVES; i++) {
- drive = &hwif->drives[i];
+ drive = hwif->devices[i];
memset(drive->acpidata, 0, sizeof(*drive->acpidata));
@@ -745,7 +745,7 @@ void ide_acpi_port_init_devices(ide_hwif
ide_acpi_push_timing(hwif);
for (i = 0; i < MAX_DRIVES; i++) {
- drive = &hwif->drives[i];
+ drive = hwif->devices[i];
if (drive->dev_flags & IDE_DFLAG_PRESENT)
/* Execute ACPI startup code */
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -1111,7 +1111,7 @@ 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->drives[unit];
+ ide_drive_t *tdrive = hwif->devices[unit];
if (tdrive->dev_flags & IDE_DFLAG_PRESENT &&
tdrive->dev_flags & IDE_DFLAG_PARKED &&
@@ -1134,7 +1134,7 @@ static ide_startstop_t do_reset1 (ide_dr
* for any of the drives on this interface.
*/
for (unit = 0; unit < MAX_DRIVES; ++unit)
- pre_reset(&hwif->drives[unit]);
+ pre_reset(hwif->devices[unit]);
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
@@ -463,7 +463,7 @@ static int do_probe (ide_drive_t *drive,
if (ide_read_device(drive) != drive->select && present == 0) {
if (drive->dn & 1) {
/* exit with drive0 selected */
- SELECT_DRIVE(&hwif->drives[0]);
+ SELECT_DRIVE(hwif->devices[0]);
/* allow ATA_BUSY to assert & clear */
msleep(50);
}
@@ -509,7 +509,7 @@ static int do_probe (ide_drive_t *drive,
}
if (drive->dn & 1) {
/* exit with drive0 selected */
- SELECT_DRIVE(&hwif->drives[0]);
+ SELECT_DRIVE(hwif->devices[0]);
msleep(50);
/* ensure drive irq is clear */
(void)tp_ops->read_status(hwif);
@@ -715,7 +715,7 @@ static int ide_port_wait_ready(ide_hwif_
/* Now make sure both master & slave are ready */
for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
/* Ignore disks that we will not probe for later. */
if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
@@ -733,7 +733,7 @@ static int ide_port_wait_ready(ide_hwif_
out:
/* Exit function with master reselected (let's be sane) */
if (unit)
- SELECT_DRIVE(&hwif->drives[0]);
+ SELECT_DRIVE(hwif->devices[0]);
return rc;
}
@@ -749,7 +749,7 @@ out:
void ide_undecoded_slave(ide_drive_t *dev1)
{
- ide_drive_t *dev0 = &dev1->hwif->drives[0];
+ ide_drive_t *dev0 = dev1->hwif->devices[0];
if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
return;
@@ -784,8 +784,8 @@ static int ide_probe_port(ide_hwif_t *hw
BUG_ON(hwif->present);
- if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) &&
- (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE))
+ if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
+ (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
return -EACCES;
/*
@@ -807,7 +807,7 @@ static int ide_probe_port(ide_hwif_t *hw
* but a lot of cdrom drives are configured as single slaves.
*/
for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
(void) probe_for_drive(drive);
if (drive->dev_flags & IDE_DFLAG_PRESENT)
@@ -832,7 +832,7 @@ static void ide_port_tune_devices(ide_hw
int unit;
for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
if (port_ops && port_ops->quirkproc)
@@ -841,7 +841,7 @@ static void ide_port_tune_devices(ide_hw
}
for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
ide_set_max_pio(drive);
@@ -854,7 +854,7 @@ static void ide_port_tune_devices(ide_hw
}
for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||
drive->id[ATA_ID_DWORD_IO])
@@ -931,7 +931,7 @@ static int ide_port_setup_devices(ide_hw
mutex_lock(&ide_cfg_mtx);
for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = &hwif->drives[i];
+ ide_drive_t *drive = hwif->devices[i];
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
continue;
@@ -1017,7 +1017,7 @@ static struct kobject *ata_probe(dev_t d
{
ide_hwif_t *hwif = data;
int unit = *part >> PARTN_BITS;
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
return NULL;
@@ -1164,7 +1164,7 @@ static void hwif_register_devices(ide_hw
unsigned int i;
for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = &hwif->drives[i];
+ ide_drive_t *drive = hwif->devices[i];
struct device *dev = &drive->gendev;
int ret;
@@ -1190,7 +1190,7 @@ static void ide_port_init_devices(ide_hw
int i;
for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = &hwif->drives[i];
+ ide_drive_t *drive = hwif->devices[i];
drive->dn = i + hwif->channel * 2;
@@ -1285,7 +1285,7 @@ static void ide_port_init_devices_data(i
int unit;
for (unit = 0; unit < MAX_DRIVES; ++unit) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
u8 j = (hwif->index * MAX_DRIVES) + unit;
memset(drive, 0, sizeof(*drive));
@@ -1309,9 +1309,6 @@ static void ide_port_init_devices_data(i
static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
{
- /* bulk initialize hwif & drive info with zeros */
- memset(hwif, 0, sizeof(ide_hwif_t));
-
/* fill in any non-zero initial values */
hwif->index = index;
hwif->major = ide_hwif_to_major[index];
@@ -1388,6 +1385,34 @@ static void ide_free_port_slot(int idx)
mutex_unlock(&ide_cfg_mtx);
}
+static void ide_port_free_devices(ide_hwif_t *hwif)
+{
+ int i;
+
+ for (i = 0; i < MAX_DRIVES; i++)
+ kfree(hwif->devices[i]);
+}
+
+static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
+{
+ int i;
+
+ for (i = 0; i < MAX_DRIVES; i++) {
+ ide_drive_t *drive;
+
+ drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
+ if (drive == NULL)
+ goto out_nomem;
+
+ hwif->devices[i] = drive;
+ }
+ return 0;
+
+out_nomem:
+ ide_port_free_devices(hwif);
+ return -ENOMEM;
+}
+
struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
{
struct ide_host *host;
@@ -1410,6 +1435,11 @@ struct ide_host *ide_host_alloc(const st
if (hwif == NULL)
continue;
+ if (ide_port_alloc_devices(hwif, node) < 0) {
+ kfree(hwif);
+ continue;
+ }
+
idx = ide_find_port_slot(d);
if (idx < 0) {
printk(KERN_ERR "%s: no free slot for interface\n",
@@ -1575,7 +1605,7 @@ static void __ide_port_unregister_device
int i;
for (i = 0; i < MAX_DRIVES; i++) {
- ide_drive_t *drive = &hwif->drives[i];
+ ide_drive_t *drive = hwif->devices[i];
if (drive->dev_flags & IDE_DFLAG_PRESENT) {
device_unregister(&drive->gendev);
@@ -1651,6 +1681,7 @@ void ide_host_free(struct ide_host *host
if (hwif == NULL)
continue;
+ ide_port_free_devices(hwif);
ide_free_port_slot(hwif->index);
kfree(hwif);
}
Index: b/drivers/ide/ide-proc.c
===================================================================
--- a/drivers/ide/ide-proc.c
+++ b/drivers/ide/ide-proc.c
@@ -599,7 +599,7 @@ void ide_proc_port_register_devices(ide_
char name[64];
for (d = 0; d < MAX_DRIVES; d++) {
- ide_drive_t *drive = &hwif->drives[d];
+ ide_drive_t *drive = hwif->devices[d];
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
@@ -497,7 +497,7 @@ void ide_port_apply_params(ide_hwif_t *h
}
for (i = 0; i < MAX_DRIVES; i++)
- ide_dev_apply_params(&hwif->drives[i], i);
+ ide_dev_apply_params(hwif->devices[i], i);
}
/*
Index: b/drivers/ide/scc_pata.c
===================================================================
--- a/drivers/ide/scc_pata.c
+++ b/drivers/ide/scc_pata.c
@@ -259,7 +259,7 @@ static void scc_set_dma_mode(ide_drive_t
unsigned long scrcst_port = ctl_base + 0x014;
unsigned long udenvt_port = ctl_base + 0x018;
unsigned long tdvhsel_port = ctl_base + 0x020;
- int is_slave = (&hwif->drives[1] == drive);
+ int is_slave = drive->dn & 1;
int offset, idx;
unsigned long reg;
unsigned long jcactsel;
@@ -413,7 +413,8 @@ static int scc_dma_end(ide_drive_t *driv
if (rq)
rq->errors |= ERROR_RESET;
for (unit = 0; unit < MAX_DRIVES; unit++) {
- ide_drive_t *drive = &hwif->drives[unit];
+ ide_drive_t *drive = hwif->devices[unit];
+
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 drives[MAX_DRIVES]; /* drive info */
+ ide_drive_t *devices[MAX_DRIVES];
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
@@ -1599,7 +1599,7 @@ static inline int hwif_to_node(ide_hwif_
static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
{
- ide_drive_t *peer = &drive->hwif->drives[(drive->dn ^ 1) & 1];
+ ide_drive_t *peer = drive->hwif->devices[(drive->dn ^ 1) & 1];
return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
}
--
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