[PATCH] block: use put_io_context_active() to disassociate bio from a task

[Hou Tao]

bio_associate_current() invokes get_io_context_active() to tell
CFQ scheduler that the current io_context is still issuing IOs
by increasing active_ref. When the bio is done, we also need
to invoke put_io_context_active() to decrease active_ref else
the associated io_context will always be active.

Signed-off-by: Hou Tao <hout...@huawei.com>
---
 block/bio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/bio.c b/block/bio.c
index 5eec5e0..d8ed36f 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -2072,7 +2072,7 @@ EXPORT_SYMBOL_GPL(bio_associate_current);
 void bio_disassociate_task(struct bio *bio)
 {
        if (bio->bi_ioc) {
-               put_io_context(bio->bi_ioc);
+               put_io_context_active(bio->bi_ioc);
                bio->bi_ioc = NULL;
        }
        if (bio->bi_css) {
-- 
2.5.0