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Subject[024/146] gdrom,viocd: Convert to bdops->check_events()
2.6.38-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Tejun Heo <tj@kernel.org>

commit 1c27030bd21e7e2c68ef5be9f28c63778cf4b27f upstream.

Convert gdrom and viocd from ->media_changed() to ->check_events().

It's unclear how the conditions are cleared 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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/cdrom/gdrom.c | 16 ++++++++++------
drivers/cdrom/viocd.c | 17 ++++++++++-------
2 files changed, 20 insertions(+), 13 deletions(-)
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -395,10 +395,12 @@ static int gdrom_drivestatus(struct cdro
return CDS_NO_INFO;
}

-static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore)
+static unsigned int gdrom_check_events(struct cdrom_device_info *cd_info,
+ unsigned int clearing, int ignore)
{
/* check the sense key */
- return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60;
+ return (__raw_readb(GDROM_ERROR_REG) & 0xF0) == 0x60 ?
+ DISK_EVENT_MEDIA_CHANGE : 0;
}

/* reset the G1 bus */
@@ -483,7 +485,7 @@ static struct cdrom_device_ops gdrom_ops
.open = gdrom_open,
.release = gdrom_release,
.drive_status = gdrom_drivestatus,
- .media_changed = gdrom_mediachanged,
+ .check_events = gdrom_check_events,
.get_last_session = gdrom_get_last_session,
.reset = gdrom_hardreset,
.audio_ioctl = gdrom_audio_ioctl,
@@ -509,9 +511,10 @@ static int gdrom_bdops_release(struct ge
return 0;
}

-static int gdrom_bdops_mediachanged(struct gendisk *disk)
+static unsigned int gdrom_bdops_check_events(struct gendisk *disk,
+ unsigned int clearing)
{
- return cdrom_media_changed(gd.cd_info);
+ return cdrom_check_events(gd.cd_info, clearing);
}

static int gdrom_bdops_ioctl(struct block_device *bdev, fmode_t mode,
@@ -530,7 +533,7 @@ static const struct block_device_operati
.owner = THIS_MODULE,
.open = gdrom_bdops_open,
.release = gdrom_bdops_release,
- .media_changed = gdrom_bdops_mediachanged,
+ .check_events = gdrom_bdops_check_events,
.ioctl = gdrom_bdops_ioctl,
};

@@ -800,6 +803,7 @@ static int __devinit probe_gdrom(struct
goto probe_fail_cdrom_register;
}
gd.disk->fops = &gdrom_bdops;
+ gd.disk->events = DISK_EVENT_MEDIA_CHANGE;
/* latch on to the interrupt */
err = gdrom_set_interrupt_handlers();
if (err)
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -186,10 +186,11 @@ static int viocd_blk_ioctl(struct block_
return ret;
}

-static int viocd_blk_media_changed(struct gendisk *disk)
+static unsigned int viocd_blk_check_events(struct gendisk *disk,
+ unsigned int clearing)
{
struct disk_info *di = disk->private_data;
- return cdrom_media_changed(&di->viocd_info);
+ return cdrom_check_events(&di->viocd_info, clearing);
}

static const struct block_device_operations viocd_fops = {
@@ -197,7 +198,7 @@ static const struct block_device_operati
.open = viocd_blk_open,
.release = viocd_blk_release,
.ioctl = viocd_blk_ioctl,
- .media_changed = viocd_blk_media_changed,
+ .check_events = viocd_blk_check_events,
};

static int viocd_open(struct cdrom_device_info *cdi, int purpose)
@@ -320,7 +321,8 @@ static void do_viocd_request(struct requ
}
}

-static int viocd_media_changed(struct cdrom_device_info *cdi, int disc_nr)
+static unsigned int viocd_check_events(struct cdrom_device_info *cdi,
+ unsigned int clearing, int disc_nr)
{
struct viocd_waitevent we;
HvLpEvent_Rc hvrc;
@@ -340,7 +342,7 @@ static int viocd_media_changed(struct cd
if (hvrc != 0) {
pr_warning("bad rc on HvCallEvent_signalLpEventFast %d\n",
(int)hvrc);
- return -EIO;
+ return 0;
}

wait_for_completion(&we.com);
@@ -354,7 +356,7 @@ static int viocd_media_changed(struct cd
return 0;
}

- return we.changed;
+ return we.changed ? DISK_EVENT_MEDIA_CHANGE : 0;
}

static int viocd_lock_door(struct cdrom_device_info *cdi, int locking)
@@ -550,7 +552,7 @@ static int viocd_audio_ioctl(struct cdro
static struct cdrom_device_ops viocd_dops = {
.open = viocd_open,
.release = viocd_release,
- .media_changed = viocd_media_changed,
+ .check_events = viocd_check_events,
.lock_door = viocd_lock_door,
.generic_packet = viocd_packet,
.audio_ioctl = viocd_audio_ioctl,
@@ -624,6 +626,7 @@ static int viocd_probe(struct vio_dev *v
gendisk->queue = q;
gendisk->fops = &viocd_fops;
gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE;
+ gendisk->events = DISK_EVENT_MEDIA_CHANGE;
set_capacity(gendisk, 0);
gendisk->private_data = d;
d->viocd_disk = gendisk;



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