floppy,{ami|ata}flop: Convert to bdops->check_events()

Convert the floppy drivers from ->media_changed() to ->check_events().
Both floppy and ataflop buffer media changed state bit and clear them
on revalidation and will behave correctly with kernel event polling.

I can't tell how amiflop clears its event and it's possible that it
may generate spurious events when polled.

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

1 files changed, 6 insertions, 4 deletions

diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 77fc76f8aea9..3851dbc03e05 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -3770,13 +3770,14 @@ out2:
 /*
  * Check if the disk has been changed or if a change has been faked.
  */
-static int check_floppy_change(struct gendisk *disk)
+static unsigned int floppy_check_events(struct gendisk *disk,
+                                        unsigned int clearing)
 {
         int drive = (long)disk->private_data;
 
         if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) ||
             test_bit(FD_VERIFY_BIT, &UDRS->flags))
-                return 1;
+                return DISK_EVENT_MEDIA_CHANGE;
 
         if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) {
                 lock_fdc(drive, false);
@@ -3788,7 +3789,7 @@ static int check_floppy_change(struct gendisk *disk)
             test_bit(FD_VERIFY_BIT, &UDRS->flags) ||
             test_bit(drive, &fake_change) ||
             drive_no_geom(drive))
-                return 1;
+                return DISK_EVENT_MEDIA_CHANGE;
         return 0;
 }
 
@@ -3898,7 +3899,7 @@ static const struct block_device_operations floppy_fops = {
         .release                = floppy_release,
         .ioctl                  = fd_ioctl,
         .getgeo                 = fd_getgeo,
-        .media_changed          = check_floppy_change,
+        .check_events           = floppy_check_events,
         .revalidate_disk        = floppy_revalidate,
 };
 
@@ -4205,6 +4206,7 @@ static int __init floppy_init(void)
                 disks[dr]->major = FLOPPY_MAJOR;
                 disks[dr]->first_minor = TOMINOR(dr);
                 disks[dr]->fops = &floppy_fops;
+                disks[dr]->events = DISK_EVENT_MEDIA_CHANGE;
                 sprintf(disks[dr]->disk_name, "fd%d", dr);
 
                 init_timer(&motor_off_timer[dr]);