ide: don't try to unregister interfaces if 'initializing' in ide_register_hw()

Host drivers using ide_register_hw() and 'initializing == 1':

* ide-pnp
  - depends on ISA

* ide_arm 
  - ARM arch specific
  - initialized before all other host drivers

* ide-cris
  - CRIS arch specific => IDE_ARCH_OBSOLETE_INIT is not defined
  - broken

* ide-h8300
  - H8300 arch specific => IDE_ARCH_OBSOLETE_INIT is not defined, no PCI

* buddha/q40/gayle/macide/falconide
  - M68K arch specific => IDE_ARCH_OBSOLETE_INIT is not defined, no PCI

Since the only host drivers which probe interfaces before the above ones are:

* ali14xx/dtc2278/ht6560b/qd65xx/umc8672
  - depend on ISA
  - require IDE_ARCH_OBSOLETE_INIT=y to work

* PCI ones
  - depend on PCI

don't try to unregister interfaces if 'initializing == 1' in ide_register_hw()
(it is possible that built-in host drivers will claim all IDE interfaces but
later ide-pnp host driver will try to unregister them - this change fixes it).

Also skip hwif->hold check if 'initializing == 1' since it is set only by:

* pmac
  - PPC && PMAC specific => no ISA

* au1xxx-ide
  - MIPS && SOC_AU1200 specific => no ISA

and use ide_find_port() helper to find free ide_hwifs[] slot.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 0d7328e0fb96..8ef521f66f87 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -694,6 +694,15 @@ int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
         int index, retry = 1;
         ide_hwif_t *hwif;
 
+        if (initializing) {
+                hwif = ide_find_port(hw->io_ports[IDE_DATA_OFFSET]);
+                if (hwif) {
+                        index = hwif->index;
+                        goto found;
+                }
+                return -1;
+        }
+
         do {
                 for (index = 0; index < MAX_HWIFS; ++index) {
                         hwif = &ide_hwifs[index];
@@ -704,8 +713,7 @@ int ide_register_hw(hw_regs_t *hw, void (*quirkproc)(ide_drive_t *),
                         hwif = &ide_hwifs[index];
                         if (hwif->hold)
                                 continue;
-                        if ((!hwif->present && !hwif->mate && !initializing) ||
-                            (!hwif->io_ports[IDE_DATA_OFFSET] && initializing))
+                        if (!hwif->present && hwif->mate == NULL)
                                 goto found;
                 }
                 for (index = 0; index < MAX_HWIFS; index++)