block: Add fallthrough markers to switch statements

[karo-tx-linux.git] / block / blk-mq.c

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 6268380c680fcf315b6173355ad2a1d93e978626..1c4f1f4978c6f0934a04c6a4e493e17a2b9c60f9 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1129,8 +1129,10 @@ static int blk_mq_hctx_next_cpu(struct blk_mq_hw_ctx *hctx)
 static void __blk_mq_delay_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async,
                                        unsigned long msecs)
 {
-       if (unlikely(blk_mq_hctx_stopped(hctx) ||
-                    !blk_mq_hw_queue_mapped(hctx)))
+       if (WARN_ON_ONCE(!blk_mq_hw_queue_mapped(hctx)))
+               return;
+
+       if (unlikely(blk_mq_hctx_stopped(hctx)))
                return;
 
        if (!async && !(hctx->flags & BLK_MQ_F_BLOCKING)) {
@@ -1295,7 +1297,7 @@ static void blk_mq_run_work_fn(struct work_struct *work)
 
 void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs)
 {
-       if (unlikely(!blk_mq_hw_queue_mapped(hctx)))
+       if (WARN_ON_ONCE(!blk_mq_hw_queue_mapped(hctx)))
                return;
 
        /*
@@ -1317,6 +1319,8 @@ static inline void __blk_mq_insert_req_list(struct blk_mq_hw_ctx *hctx,
 {
        struct blk_mq_ctx *ctx = rq->mq_ctx;
 
+       lockdep_assert_held(&ctx->lock);
+
        trace_block_rq_insert(hctx->queue, rq);
 
        if (at_head)
@@ -1330,6 +1334,8 @@ void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
 {
        struct blk_mq_ctx *ctx = rq->mq_ctx;
 
+       lockdep_assert_held(&ctx->lock);
+
        __blk_mq_insert_req_list(hctx, rq, at_head);
        blk_mq_hctx_mark_pending(hctx, ctx);
 }