: Suppress output of error messages for non-existant interfaces

Suppress output of "Wait for ready failed before probe !" messages for non-existant interfaces.

Please see
http://marc.theaimsgroup.com/?l=linux-ide&m=110553792013649&w=2 for further context on this patch.

drivers/ide/ide-probe.c 2005-01-12 09:01:25.000000000 -0500 renamed from drivers/ide/ide-probe.c 2005-01-12 09:00:49.000000000 -0500 +1 -1

@@ -742,21 +742,21 @@
         *    their reset sequence even when they are non-selected slave
         *    devices, thus preventing discovery of the main HD
         *
         *  Doing this wait-for-busy should not harm any existing configuration
         *  (at least things won't be worse than what current code does, that
         *  is blindly go & talk to the drive) and fix some issues like the
         *  above.
         *
         *  BenH.
         */
-       if (wait_hwif_ready(hwif))
+       if (wait_hwif_ready(hwif) == -EBUSY)
                printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
 
        /*
         * Second drive should only exist if first drive was found,
         * 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];
                drive->dn = (hwif->channel ? 2 : 0) + unit;
                (void) probe_for_drive(drive);