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authorTejun Heo <tj@kernel.org>2011-04-21 20:54:46 +0200
committerJens Axboe <jaxboe@fusionio.com>2011-04-21 20:54:46 +0200
commitd4dc210f69bcb0b4bef5a83b1c323817be89bad1 (patch)
tree58774a27fa6faff1260a416a86d2c121f0013431 /drivers/cdrom
parent1196f8b814f32cd04df334abf47648c2a9fd8324 (diff)
downloadlinux-d4dc210f69bcb0b4bef5a83b1c323817be89bad1.tar.gz
block: don't block events on excl write for non-optical devices
Disk event code automatically blocks events on excl write. This is primarily to avoid issuing polling commands while burning is in progress. This behavior doesn't fit other types of devices with removeable media where polling commands don't have adverse side effects and door locking usually doesn't exist. This patch introduces new genhd flag which controls the auto-blocking behavior and uses it to enable auto-blocking only on optical devices. Note for stable: 2.6.38 and later only Cc: stable@kernel.org Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'drivers/cdrom')
-rw-r--r--drivers/cdrom/viocd.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/cdrom/viocd.c b/drivers/cdrom/viocd.c
index 4e874c5fa60..ae15a4ddaa9 100644
--- a/drivers/cdrom/viocd.c
+++ b/drivers/cdrom/viocd.c
@@ -625,7 +625,8 @@ static int viocd_probe(struct vio_dev *vdev, const struct vio_device_id *id)
blk_queue_max_hw_sectors(q, 4096 / 512);
gendisk->queue = q;
gendisk->fops = &viocd_fops;
- gendisk->flags = GENHD_FL_CD|GENHD_FL_REMOVABLE;
+ gendisk->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE |
+ GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
gendisk->events = DISK_EVENT_MEDIA_CHANGE;
set_capacity(gendisk, 0);
gendisk->private_data = d;