ide: fix hwif->gendev refcounting

class->dev_release is called by device_release() iff dev->release
is not present so ide_port_class_release() is never called and the
last hwif->gendev reference is not dropped.

Fix it by removing ide_port_class_release() and get_device() call
from ide_register_port() (device_create_drvdata() takes a hwif->gendev
reference anyway).

This patch fixes hang on wait_for_completion(&hwif->gendev_rel_comp)
in ide_unregister() reported by Pavel Machek.

Cc: Pavel Machek <pavel@suse.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 380fa0c8cc84..d27061b39324 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -646,8 +646,6 @@ static int ide_register_port(ide_hwif_t *hwif)
                 goto out;
         }
 
-        get_device(&hwif->gendev);
-
         hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev,
                                               MKDEV(0, 0), hwif, hwif->name);
         if (IS_ERR(hwif->portdev)) {