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@gmail.com>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 00c7e5a..006e601 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -463,7 +463,7 @@
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 @@
}
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 @@
/* 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 @@
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 @@
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 @@
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 @@
* 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 @@
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 @@
}
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 @@
}
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 @@
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 @@
{
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 @@
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 @@
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 @@
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_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 @@
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 @@
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 @@
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 @@
if (hwif == NULL)
continue;
+ ide_port_free_devices(hwif);
ide_free_port_slot(hwif->index);
kfree(hwif);
}