From: Jeff Mahoney Date: Mon, 26 Jun 2006 07:27:25 +0000 (-0700) Subject: [PATCH] dm: fix block device initialisation X-Git-Tag: v2.6.18-rc1~662 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f0b04115368ff383654a3bd26baf8f4be5e81132;p=linux-2.6 [PATCH] dm: fix block device initialisation In alloc_dev(), we register the device with the block layer and then continue to initialize the device. But register_disk() makes the device available to be opened before we have completed initialising it. This patch moves the final bits of the initialization above the disk registration. [akpm: too late for 2.6.17 - suitable for 2.6.17.x after it has settled] Signed-off-by: Jeff Mahoney Signed-off-by: Alasdair G Kergon Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 29af584ae8..dfd0378589 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -891,6 +891,10 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent) if (!md->disk) goto bad4; + atomic_set(&md->pending, 0); + init_waitqueue_head(&md->wait); + init_waitqueue_head(&md->eventq); + md->disk->major = _major; md->disk->first_minor = minor; md->disk->fops = &dm_blk_dops; @@ -900,10 +904,6 @@ static struct mapped_device *alloc_dev(unsigned int minor, int persistent) add_disk(md->disk); format_dev_t(md->name, MKDEV(_major, minor)); - atomic_set(&md->pending, 0); - init_waitqueue_head(&md->wait); - init_waitqueue_head(&md->eventq); - /* Populate the mapping, nobody knows we exist yet */ spin_lock(&_minor_lock); old_md = idr_replace(&_minor_idr, md, minor);