Message ID | 20210619093700.920393-3-yi.zhang@huawei.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | blk-wbt: fix two wbt enable problems | expand |
diff --git a/block/blk-wbt.c b/block/blk-wbt.c index b098ac6a84f0..f5e5ac915bf7 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -637,9 +637,13 @@ void wbt_set_write_cache(struct request_queue *q, bool write_cache_on) void wbt_enable_default(struct request_queue *q) { struct rq_qos *rqos = wbt_rq_qos(q); + /* Throttling already enabled? */ - if (rqos) + if (rqos) { + if (RQWB(rqos)->enable_state == WBT_STATE_OFF_DEFAULT) + RQWB(rqos)->enable_state = WBT_STATE_ON_DEFAULT; return; + } /* Queue not registered? Maybe shutting down... */ if (!blk_queue_registered(q))
After commit a79050434b45 ("blk-rq-qos: refactor out common elements of blk-wbt"), if throttle was disabled by wbt_disable_default(), we could not enable again, fix this by set enable_state back to WBT_STATE_ON_DEFAULT. Fixes: a79050434b45 ("blk-rq-qos: refactor out common elements of blk-wbt") Signed-off-by: Zhang Yi <yi.zhang@huawei.com> --- block/blk-wbt.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)