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| author | Ming Lei <ming.lei@canonical.com> | 2014-12-03 19:38:04 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-12-08 21:37:08 -0700 |
| commit | 19c66e59ce57e7b181625cbb408d48eb10837763 (patch) | |
| tree | 4eb5617cb983d279305e7b9f7e65cf61f0175d2a /block/blk-mq.h | |
| parent | 080ff3511450fd73948697fef34a3cc382675b59 (diff) | |
| download | lwn-19c66e59ce57e7b181625cbb408d48eb10837763.tar.gz lwn-19c66e59ce57e7b181625cbb408d48eb10837763.zip | |
blk-mq: prevent unmapped hw queue from being scheduled
When one hardware queue has no mapped software queues, it
shouldn't have been scheduled. Otherwise WARNING or OOPS
can triggered.
blk_mq_hw_queue_mapped() helper is introduce for fixing
the problem.
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.h')
| -rw-r--r-- | block/blk-mq.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/blk-mq.h b/block/blk-mq.h index d567d5283ffa..206230e64f79 100644 --- a/block/blk-mq.h +++ b/block/blk-mq.h @@ -115,4 +115,9 @@ static inline void blk_mq_set_alloc_data(struct blk_mq_alloc_data *data, data->hctx = hctx; } +static inline bool blk_mq_hw_queue_mapped(struct blk_mq_hw_ctx *hctx) +{ + return hctx->nr_ctx && hctx->tags; +} + #endif |