diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-06-25 12:20:41 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-07-10 14:17:30 +0300 |
| commit | 7559d612dff0389aba5b49664e3bc94a150e45f2 (patch) | |
| tree | 649058e9c0d3b23024e082f1118a71b81763369c /drivers/mmc/core | |
| parent | 1cdca16c043abd4803c3979e5faefaa623703e66 (diff) | |
| download | linux-7559d612dff0389aba5b49664e3bc94a150e45f2.tar.xz | |
mmc: core: let the dma map ops handle bouncing
Just like we do for all other block drivers. Especially as the limit
imposed at the moment might be way to pessimistic for iommus.
This also means we are not going to set a bounce limit for the queue, in
case we have a dma mask. On most architectures it was never needed, the
major hold out was x86-32 with PAE, but that has been fixed by now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/core')
| -rw-r--r-- | drivers/mmc/core/queue.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c index 92900a095796..4bf9cd881bd0 100644 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -354,18 +354,15 @@ static const struct blk_mq_ops mmc_mq_ops = { static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) { struct mmc_host *host = card->host; - u64 limit = BLK_BOUNCE_HIGH; unsigned block_size = 512; - if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask) - limit = (u64)dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT; - blk_queue_flag_set(QUEUE_FLAG_NONROT, mq->queue); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, mq->queue); if (mmc_can_erase(card)) mmc_queue_setup_discard(mq->queue, card); - blk_queue_bounce_limit(mq->queue, limit); + if (!mmc_dev(host)->dma_mask || !*mmc_dev(host)->dma_mask) + blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH); blk_queue_max_hw_sectors(mq->queue, min(host->max_blk_count, host->max_req_size / 512)); blk_queue_max_segments(mq->queue, host->max_segs); |