ide: legacy PCI bus order probing fixes

IDE PCI host drivers should register themselves with IDE core only when
IDE driver is built-in, otherwise (IDE driver is modular and thus IDE PCI
host drivers are also modular) the code has no effect and just complicates
the probing.

Fix it by adding new config option CONFIG_IDEPCI_PCIBUS (defined only when
needed and invisible to the user) and covering by #ifdef/#endif the code
in question.  It turned out that "ide=reverse" was silently accepted but did
nothing in case when IDE driver was modular, this is fixed now.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 52d482a16dd..df4e6a51031 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1205,9 +1205,14 @@ void ide_init_disk(struct gendisk *, ide_drive_t *);
 
 extern int ideprobe_init(void);
 
+#ifdef CONFIG_IDEPCI_PCIBUS_ORDER
 extern void ide_scan_pcibus(int scan_direction) __init;
 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
+#else
+#define ide_pci_register_driver(d) pci_register_driver(d)
+#endif
+
 void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);
 extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);