block, bfq: skip dispatch when selected queue has no next_rq#862
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bfq_dispatch_rq_from_bfqq() dispatches bfqq->next_rq directly. Add a guard in __bfq_dispatch_request() so that dispatch is skipped if the selected queue unexpectedly has no next request. This keeps behavior unchanged in normal paths while avoiding entering the dispatch helper with a missing next_rq. Signed-off-by: liyouhong <liyouhong@kylinos.cn>
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Pull request for series with
subject: block, bfq: skip dispatch when selected queue has no next_rq
version: 1
url: https://patchwork.kernel.org/project/linux-block/list/?series=1097905