[PATCH 13/14] mmc: core: don't use block layer bounce buffers

Christoph Hellwig
2019-02-12T07:25:27Z

All MMC and SD host drivers are highmem safe now, and bounce buffering
for addressing limitations is handled in the DMA layer now.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/mmc/core/queue.c | 5 -----
1 file changed, 5 deletions(-)

diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c
index 71cd2411329e..1c92a2a4d641 100644
--- a/drivers/mmc/core/queue.c
+++ b/drivers/mmc/core/queue.c
@@ -354,17 +354,12 @@ 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;
-
- 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);
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);
--
2.20.1