block: fix inconsistency in I/O stat accounting code

[linux-2.6-omap-h63xx.git] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 25572802dac2bccc42fff74b91a915b7bd001693..3688abff24307eccc0f702541c311e11b71f90d8 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -64,12 +64,11 @@ static struct workqueue_struct *kblockd_workqueue;
 
 static void drive_stat_acct(struct request *rq, int new_io)
 {
-       struct gendisk *disk = rq->rq_disk;
        struct hd_struct *part;
        int rw = rq_data_dir(rq);
        int cpu;
 
-       if (!blk_fs_request(rq) || !disk || !blk_do_io_stat(disk->queue))
+       if (!blk_fs_request(rq) || !blk_do_io_stat(rq))
                return;
 
        cpu = part_stat_lock();
@@ -1675,9 +1674,7 @@ EXPORT_SYMBOL(blkdev_dequeue_request);
 
 static void blk_account_io_completion(struct request *req, unsigned int bytes)
 {
-       struct gendisk *disk = req->rq_disk;
-
-       if (!disk || !blk_do_io_stat(disk->queue))
+       if (!blk_do_io_stat(req))
                return;
 
        if (blk_fs_request(req)) {
@@ -1694,9 +1691,7 @@ static void blk_account_io_completion(struct request *req, unsigned int bytes)
 
 static void blk_account_io_done(struct request *req)
 {
-       struct gendisk *disk = req->rq_disk;
-
-       if (!disk || !blk_do_io_stat(disk->queue))
+       if (!blk_do_io_stat(req))
                return;
 
        /*
@@ -1711,7 +1706,7 @@ static void blk_account_io_done(struct request *req)
                int cpu;
 
                cpu = part_stat_lock();
-               part = disk_map_sector_rcu(disk, req->sector);
+               part = disk_map_sector_rcu(req->rq_disk, req->sector);
 
                part_stat_inc(cpu, part, ios[rw]);
                part_stat_add(cpu, part, ticks[rw], duration);