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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 6971c285a212..8a6f893d127e 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -497,7 +497,7 @@ void ide_port_apply_params(ide_hwif_t *hwif)
 	}
 
 	for (i = 0; i < MAX_DRIVES; i++)
-		ide_dev_apply_params(&hwif->drives[i], i);
+		ide_dev_apply_params(hwif->devices[i], i);
 }
 
 /*