On Mon, 3 Dec 2007 14:47:22 -0800
Andrew Morton <[email protected]> wrote:
> Does this fix?
Slightly more elaborate version
- handle errors
- don't do illegal things under spinlock
- clean up error unwinding
--- a/drivers/block/aoe/aoeblk.c~aoe-properly-initialise-the-request_queues-backing_dev_info
+++ a/drivers/block/aoe/aoeblk.c
@@ -6,6 +6,7 @@
#include <linux/hdreg.h>
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/genhd.h>
@@ -210,25 +211,20 @@ aoeblk_gdalloc(void *vp)
if (gd == NULL) {
printk(KERN_ERR "aoe: cannot allocate disk structure for %ld.%ld\n",
d->aoemajor, d->aoeminor);
- spin_lock_irqsave(&d->lock, flags);
- d->flags &= ~DEVFL_GDALLOC;
- spin_unlock_irqrestore(&d->lock, flags);
- return;
+ goto err;
}
d->bufpool = mempool_create_slab_pool(MIN_BUFS, buf_pool_cache);
if (d->bufpool == NULL) {
printk(KERN_ERR "aoe: cannot allocate bufpool for %ld.%ld\n",
d->aoemajor, d->aoeminor);
- put_disk(gd);
- spin_lock_irqsave(&d->lock, flags);
- d->flags &= ~DEVFL_GDALLOC;
- spin_unlock_irqrestore(&d->lock, flags);
- return;
+ goto err_disk;
}
- spin_lock_irqsave(&d->lock, flags);
blk_queue_make_request(&d->blkq, aoeblk_make_request);
+ if (bdi_init(&d->blkq.backing_dev_info))
+ goto err_mempool;
+ spin_lock_irqsave(&d->lock, flags);
gd->major = AOE_MAJOR;
gd->first_minor = d->sysminor * AOE_PARTITIONS;
gd->fops = &aoe_bdops;
@@ -246,6 +242,16 @@ aoeblk_gdalloc(void *vp)
add_disk(gd);
aoedisk_add_sysfs(d);
+ return;
+
+err_mempool:
+ mempool_destroy(d->bufpool);
+err_disk:
+ put_disk(gd);
+err:
+ spin_lock_irqsave(&d->lock, flags);
+ d->flags &= ~DEVFL_GDALLOC;
+ spin_unlock_irqrestore(&d->lock, flags);
}
void
_
It was done lackadaisically and needs checking.
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