Fix congestion_wait() sync/async vs read/write confusion

Commit 1faa16d22877f4839bd433547d770c676d1d964c accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

2 files changed, 7 insertions, 5 deletions

diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 83650e00632d..99a506f619b7 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -1372,8 +1372,10 @@ try_next_bio:
         wakeup = (pd->write_congestion_on > 0
                         && pd->bio_queue_size <= pd->write_congestion_off);
         spin_unlock(&pd->lock);
-        if (wakeup)
-                clear_bdi_congested(&pd->disk->queue->backing_dev_info, WRITE);
+        if (wakeup) {
+                clear_bdi_congested(&pd->disk->queue->backing_dev_info,
+                                        BLK_RW_ASYNC);
+        }
 
         pkt->sleep_time = max(PACKET_WAIT_TIME, 1);
         pkt_set_state(pkt, PACKET_WAITING_STATE);
@@ -2592,10 +2594,10 @@ static int pkt_make_request(struct request_queue *q, struct bio *bio)
         spin_lock(&pd->lock);
         if (pd->write_congestion_on > 0
             && pd->bio_queue_size >= pd->write_congestion_on) {
-                set_bdi_congested(&q->backing_dev_info, WRITE);
+                set_bdi_congested(&q->backing_dev_info, BLK_RW_ASYNC);
                 do {
                         spin_unlock(&pd->lock);
-                        congestion_wait(WRITE, HZ);
+                        congestion_wait(BLK_RW_ASYNC, HZ);
                         spin_lock(&pd->lock);
                 } while(pd->bio_queue_size > pd->write_congestion_off);
         }
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 9933eb861c71..529e2ba505c3 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -776,7 +776,7 @@ static void kcryptd_crypt_write_convert(struct dm_crypt_io *io)
                  * But don't wait if split was due to the io size restriction
                  */
                 if (unlikely(out_of_pages))
-                        congestion_wait(WRITE, HZ/100);
+                        congestion_wait(BLK_RW_ASYNC, HZ/100);
 
                 /*
                  * With async crypto it is unsafe to share the crypto context