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block-5.9-2020-10-02

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Merge tag 'block-5.9-2020-10-02' of git://git.kernel.dk/linux-block

Pull block fix from Jens Axboe:
 "Single fix for a ->commit_rqs failure case"

* tag 'block-5.9-2020-10-02' of git://git.kernel.dk/linux-block:
  blk-mq: call commit_rqs while list empty but error happen
This commit is contained in:
Linus Torvalds 2020-10-02 14:34:52 -07:00
commit f016a54052
1 changed files with 9 additions and 9 deletions
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18
block/blk-mq.c
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@ -1412,6 +1412,11 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list,
hctx->dispatched[queued_to_index(queued)]++; hctx->dispatched[queued_to_index(queued)]++;
/* If we didn't flush the entire list, we could have told the driver
* there was more coming, but that turned out to be a lie.
*/
if ((!list_empty(list) || errors) && q->mq_ops->commit_rqs && queued)
q->mq_ops->commit_rqs(hctx);
/* /*
* Any items that need requeuing? Stuff them into hctx->dispatch, * Any items that need requeuing? Stuff them into hctx->dispatch,
* that is where we will continue on next queue run. * that is where we will continue on next queue run.
@ -1425,14 +1430,6 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list,
blk_mq_release_budgets(q, nr_budgets); blk_mq_release_budgets(q, nr_budgets);
/*
* If we didn't flush the entire list, we could have told
* the driver there was more coming, but that turned out to
* be a lie.
*/
if (q->mq_ops->commit_rqs && queued)
q->mq_ops->commit_rqs(hctx);
spin_lock(&hctx->lock); spin_lock(&hctx->lock);
list_splice_tail_init(list, &hctx->dispatch); list_splice_tail_init(list, &hctx->dispatch);
spin_unlock(&hctx->lock); spin_unlock(&hctx->lock);
@ -2079,6 +2076,7 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
struct list_head *list) struct list_head *list)
{ {
int queued = 0; int queued = 0;
int errors = 0;
while (!list_empty(list)) { while (!list_empty(list)) {
blk_status_t ret; blk_status_t ret;
@ -2095,6 +2093,7 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
break; break;
} }
blk_mq_end_request(rq, ret); blk_mq_end_request(rq, ret);
errors++;
} else } else
queued++; queued++;
} }
@ -2104,7 +2103,8 @@ void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
* the driver there was more coming, but that turned out to * the driver there was more coming, but that turned out to
* be a lie. * be a lie.
*/ */
if (!list_empty(list) && hctx->queue->mq_ops->commit_rqs && queued) if ((!list_empty(list) || errors) &&
hctx->queue->mq_ops->commit_rqs && queued)
hctx->queue->mq_ops->commit_rqs(hctx); hctx->queue->mq_ops->commit_rqs(hctx);
} }