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mmc: core: Use blk_mq_complete_request_direct(). 

The completion callback for the sdhci-pci device is invoked from a
kworker.
I couldn't identify in which context is mmc_blk_mq_req_done() invoke but
the remaining caller are from invoked from preemptible context. Here it
would make sense to complete the request directly instead scheduling
ksoftirqd for its completion.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20211025070658.1565848-3-bigeasy@linutronix.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Sebastian Andrzej Siewior 2021-10-25 09:06:58 +02:00 коммит произвёл Jens Axboe
Родитель e8dc17e289
Коммит 639d353143
1 изменённых файлов: 14 добавлений и 8 удалений
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22
drivers/mmc/core/block.c
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@ -2051,7 +2051,8 @@ static void mmc_blk_mq_dec_in_flight(struct mmc_queue *mq, struct request *req)
mmc_put_card(mq->card, &mq->ctx);
}
static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req,
bool can_sleep)
{
struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req);
struct mmc_request *mrq = &mqrq->brq.mrq;
@ -2063,10 +2064,14 @@ static void mmc_blk_mq_post_req(struct mmc_queue *mq, struct request *req)
* Block layer timeouts race with completions which means the normal
* completion path cannot be used during recovery.
*/
if (mq->in_recovery)
if (mq->in_recovery) {
mmc_blk_mq_complete_rq(mq, req);
else if (likely(!blk_should_fake_timeout(req->q)))
blk_mq_complete_request(req);
} else if (likely(!blk_should_fake_timeout(req->q))) {
if (can_sleep)
blk_mq_complete_request_direct(req, mmc_blk_mq_complete);
else
blk_mq_complete_request(req);
}
mmc_blk_mq_dec_in_flight(mq, req);
}
@ -2087,7 +2092,7 @@ void mmc_blk_mq_recovery(struct mmc_queue *mq)
mmc_blk_urgent_bkops(mq, mqrq);
mmc_blk_mq_post_req(mq, req);
mmc_blk_mq_post_req(mq, req, true);
}
static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
@ -2106,7 +2111,7 @@ static void mmc_blk_mq_complete_prev_req(struct mmc_queue *mq,
if (prev_req)
*prev_req = mq->complete_req;
else
mmc_blk_mq_post_req(mq, mq->complete_req);
mmc_blk_mq_post_req(mq, mq->complete_req, true);
mq->complete_req = NULL;
@ -2178,7 +2183,8 @@ static void mmc_blk_mq_req_done(struct mmc_request *mrq)
mq->rw_wait = false;
wake_up(&mq->wait);
mmc_blk_mq_post_req(mq, req);
/* context unknown */
mmc_blk_mq_post_req(mq, req, false);
}
static bool mmc_blk_rw_wait_cond(struct mmc_queue *mq, int *err)
@ -2238,7 +2244,7 @@ static int mmc_blk_mq_issue_rw_rq(struct mmc_queue *mq,
err = mmc_start_request(host, &mqrq->brq.mrq);
if (prev_req)
mmc_blk_mq_post_req(mq, prev_req);
mmc_blk_mq_post_req(mq, prev_req, true);
if (err)
mq->rw_wait = false;