aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/ide/ide.c
diff options
context:
space:
mode:
authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-07-24 16:53:15 -0400
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-07-24 16:53:15 -0400
commit08da591e14cf87247ec09b17c350235157a92fc3 (patch)
treed00a02154071c7013c31bc8dd1d3c12c86d5daca /drivers/ide/ide.c
parent6cdf6eb357c2681596b7b1672b92396ba82333d4 (diff)
ide: add ide_device_{get,put}() helpers
* Add 'struct ide_host *host' field to ide_hwif_t and set it in ide_host_alloc_all(). * Add ide_device_{get,put}() helpers loosely based on SCSI's scsi_device_{get,put}() ones. * Convert IDE device drivers to use ide_device_{get,put}(). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/ide.c')
-rw-r--r--drivers/ide/ide.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 60f0ca66aa93..772451600e4d 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -618,6 +618,53 @@ set_val:
618 618
619EXPORT_SYMBOL(generic_ide_ioctl); 619EXPORT_SYMBOL(generic_ide_ioctl);
620 620
621/**
622 * ide_device_get - get an additional reference to a ide_drive_t
623 * @drive: device to get a reference to
624 *
625 * Gets a reference to the ide_drive_t and increments the use count of the
626 * underlying LLDD module.
627 */
628int ide_device_get(ide_drive_t *drive)
629{
630 struct device *host_dev;
631 struct module *module;
632
633 if (!get_device(&drive->gendev))
634 return -ENXIO;
635
636 host_dev = drive->hwif->host->dev[0];
637 module = host_dev ? host_dev->driver->owner : NULL;
638
639 if (module && !try_module_get(module)) {
640 put_device(&drive->gendev);
641 return -ENXIO;
642 }
643
644 return 0;
645}
646EXPORT_SYMBOL_GPL(ide_device_get);
647
648/**
649 * ide_device_put - release a reference to a ide_drive_t
650 * @drive: device to release a reference on
651 *
652 * Release a reference to the ide_drive_t and decrements the use count of
653 * the underlying LLDD module.
654 */
655void ide_device_put(ide_drive_t *drive)
656{
657#ifdef CONFIG_MODULE_UNLOAD
658 struct device *host_dev = drive->hwif->host->dev[0];
659 struct module *module = host_dev ? host_dev->driver->owner : NULL;
660
661 if (module)
662 module_put(module);
663#endif
664 put_device(&drive->gendev);
665}
666EXPORT_SYMBOL_GPL(ide_device_put);
667
621static int ide_bus_match(struct device *dev, struct device_driver *drv) 668static int ide_bus_match(struct device *dev, struct device_driver *drv)
622{ 669{
623 return 1; 670 return 1;