ub: Convert to bdops->check_events()

Convert from ->media_changed() to ->check_events().

ub buffers media changed state and clears it on revalidation.  It will
behave correctly with kernel event polling.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Pete Zaitcev <zaitcev@redhat.com>

diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 9ae3bb713286f0d0d3a959a81f7f4b4db5cde1db..68b9430c7cfe56f7f23330cb152b103aef3098b9 100644 (file)
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -1788,7 +1788,8 @@ static int ub_bd_revalidate(struct gendisk *disk)
  *
  * The return code is bool!
  */
-static int ub_bd_media_changed(struct gendisk *disk)
+static unsigned int ub_bd_check_events(struct gendisk *disk,
+                                      unsigned int clearing)
 {
        struct ub_lun *lun = disk->private_data;
 
@@ -1806,10 +1807,10 @@ static int ub_bd_media_changed(struct gendisk *disk)
         */
        if (ub_sync_tur(lun->udev, lun) != 0) {
                lun->changed = 1;
-               return 1;
+               return DISK_EVENT_MEDIA_CHANGE;
        }
 
-       return lun->changed;
+       return lun->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
 }
 
 static const struct block_device_operations ub_bd_fops = {
@@ -1817,7 +1818,7 @@ static const struct block_device_operations ub_bd_fops = {
        .open           = ub_bd_unlocked_open,
        .release        = ub_bd_release,
        .ioctl          = ub_bd_ioctl,
-       .media_changed  = ub_bd_media_changed,
+       .check_events   = ub_bd_check_events,
        .revalidate_disk = ub_bd_revalidate,
 };
 
@@ -2333,6 +2334,7 @@ static int ub_probe_lun(struct ub_dev *sc, int lnum)
        disk->major = UB_MAJOR;
        disk->first_minor = lun->id * UB_PARTS_PER_LUN;
        disk->fops = &ub_bd_fops;
+       disk->events = DISK_EVENT_MEDIA_CHANGE;
        disk->private_data = lun;
        disk->driverfs_dev = &sc->intf->dev;