block: fix accounting bug on cross partition merges

[mv-sheeva.git] / fs / partitions / check.c

diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 6dfbee03ccc67337d8cc0b1f6cc834182be0867c..30f46c2cb9d5dfb4ae8691aefde7df6aebca47e6 100644 (file)
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -365,17 +365,25 @@ struct device_type part_type = {
 static void delete_partition_rcu_cb(struct rcu_head *head)
 {
        struct hd_struct *part = container_of(head, struct hd_struct, rcu_head);
+       struct gendisk *disk = part_to_disk(part);
+       struct request_queue *q = disk->queue;
+       unsigned long flags;
 
        part->start_sect = 0;
        part->nr_sects = 0;
        part_stat_set_all(part, 0);
        put_device(part_to_dev(part));
+
+       spin_lock_irqsave(q->queue_lock, flags);
+       elv_quiesce_end(q);
+       spin_unlock_irqrestore(q->queue_lock, flags);
 }
 
 void delete_partition(struct gendisk *disk, int partno)
 {
        struct disk_part_tbl *ptbl = disk->part_tbl;
        struct hd_struct *part;
+       struct request_queue *q = disk->queue;
 
        if (partno >= ptbl->len)
                return;
@@ -390,6 +398,10 @@ void delete_partition(struct gendisk *disk, int partno)
        kobject_put(part->holder_dir);
        device_del(part_to_dev(part));
 
+       spin_lock_irq(q->queue_lock);
+       elv_quiesce_start(q);
+       spin_unlock_irq(q->queue_lock);
+
        call_rcu(&part->rcu_head, delete_partition_rcu_cb);
 }