ide: fix pmac breakage

Fix breakage added in the IDE devel tree.

Add header, then fix

drivers/ide/ppc/pmac.c: In function `pmac_ide_setup_dma':
drivers/ide/ppc/pmac.c:2044: warning: assignment from incompatible pointer type
drivers/ide/ppc/pmac.c: In function `pmac_ide_dma_host_on':
drivers/ide/ppc/pmac.c:1989: warning: control reaches end of non-void function
include/linux/pci.h: In function `pmac_ide_init':
drivers/ide/ppc/pmac.c:1563: warning: ignoring return value of `pci_register_driver', declared with attribute warn_unused_result

Then add some apparently-long-missing error handling.

Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Paul Mackerras <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[e-mail]>

drivers/ide/ide.c

···
 #endif /* CONFIG_BLK_DEV_CMD640 */
 #ifdef CONFIG_BLK_DEV_IDE_PMAC
 	{
-		extern void pmac_ide_probe(void);
-		pmac_ide_probe();
+		extern int pmac_ide_probe(void);
+		(void)pmac_ide_probe();
 	}
 #endif /* CONFIG_BLK_DEV_IDE_PMAC */
 #ifdef CONFIG_BLK_DEV_GAYLE

drivers/ide/ppc/pmac.c

···
 #include <asm/mediabay.h>
 #endif
 
-#include "ide-timing.h"
+#include "../ide-timing.h"
 
 #undef IDE_PMAC_DEBUG
 
···
 };
 MODULE_DEVICE_TABLE(pci, pmac_ide_pci_match);
 
-void __init
-pmac_ide_probe(void)
+int __init pmac_ide_probe(void)
 {
+	int error;
+
 	if (!machine_is(powermac))
-		return;
+		return -ENODEV;
 
 #ifdef CONFIG_BLK_DEV_IDE_PMAC_ATA100FIRST
-	pci_register_driver(&pmac_ide_pci_driver);
-	macio_register_driver(&pmac_ide_macio_driver);
+	error = pci_register_driver(&pmac_ide_pci_driver);
+	if (error)
+		goto out;
+	error = macio_register_driver(&pmac_ide_macio_driver);
+	if (error) {
+		pci_unregister_driver(&pmac_ide_pci_driver);
+		goto out;
+	}
 #else
-	macio_register_driver(&pmac_ide_macio_driver);
-	pci_register_driver(&pmac_ide_pci_driver);
+	error = macio_register_driver(&pmac_ide_macio_driver);
+	if (error)
+		goto out;
+	error = pci_register_driver(&pmac_ide_pci_driver);
+	if (error) {
+		macio_unregister_driver(&pmac_ide_macio_driver);
+		goto out;
+	}
 #endif
+out:
+	return error;
 }
 
 #ifdef CONFIG_BLK_DEV_IDEDMA_PMAC
···
 {
 }
 
-static int pmac_ide_dma_host_on(ide_drive_t *drive)
+static void pmac_ide_dma_host_on(ide_drive_t *drive)
 {
 }