Commit 7ea3624c authored Jan 25, 2016 by Sahitya Tummala

mmc: card: set dma_mask as the queue bounce limit



Some controllers doesn't have any limitation on the memory
it can address. Hence, the bounce limit parameter must be taken
based on the device dma_mask.

Currently it is set to BLK_BOUNCE_HIGH, which may cause bouncing
of memory higher than this limit. Use dma_mask as the limit for
queue bounce parameter to avoid this unncessary memory bouncing
in the block layer.

CRs-Fixed: 964435
Change-Id: I0955438a540ca9adf5bcd3a0dbf9201a5ef456a5
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>

parent 82fbed04

drivers/mmc/card/queue.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -289,6 +289,9 @@ void mmc_cmdq_setup_queue(struct mmc_queue mq, struct mmc_card card)
		u64 limit = BLK_BOUNCE_HIGH;
		struct mmc_host *host = card->host;

		if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
		limit = *mmc_dev(host)->dma_mask;

		queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mq->queue);
		if (mmc_can_erase(card))
		mmc_queue_setup_discard(mq->queue, card);