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block: don't block events on excl write for non-optical devices

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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: [email protected]
Signed-off-by: Tejun Heo <[email protected]>
Reported-by: Kay Sievers <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2011-04-21 20:54:46 +02:00 • committed by Jens Axboe
commit d4dc210f69
6 changed files with 16 additions and 10 deletions
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2
drivers/ide/ide-cd.c
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@ -1781,7 +1781,7 @@ static int ide_cd_probe(ide_drive_t *drive)
ide_cd_read_toc(drive, &sense);
g->fops = &idecd_ops;
g->flags |= GENHD_FL_REMOVABLE;
g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
g->events = DISK_EVENT_MEDIA_CHANGE;
add_disk(g);
return 0;