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block: unexport DISK_EVENT_MEDIA_CHANGE for legacy/fringe drivers

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In-kernel disk event polling doesn't matter for legacy/fringe drivers
and may lead to infinite event loop if ->check_events() implementation
generates events on level condition instead of edge.

Now that block layer supports suppressing exporting unlisted events,
simply leaving disk->events cleared allows these drivers to keep the
internal revalidation behavior intact while avoiding weird
interactions with userland event handler.

Signed-off-by: Tejun Heo <[email protected]>
Cc: Kay Sievers <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2011-04-21 21:32:55 +02:00 • committed by Jens Axboe
commit 9fd097b149
15 changed files with 0 additions and 15 deletions
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1
drivers/s390/char/tape_block.c
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@ -236,7 +236,6 @@ tapeblock_setup_device(struct tape_device * device)
disk->major = tapeblock_major;
disk->first_minor = device->first_minor;
disk->fops = &tapeblock_fops;
disk->events = DISK_EVENT_MEDIA_CHANGE;
disk->private_data = tape_get_device(device);
disk->queue = blkdat->request_queue;
set_capacity(disk, 0);