Commit 8e0cb8a1 authored by Santosh Shilimkar's avatar Santosh Shilimkar Committed by Russell King

ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations

DMA bounce limit is the maximum direct DMA'able memory beyond which
bounce buffers has to be used to perform dma operations. MMC queue layr
relies on dma_mask but its calculation is based on max_*pfn which
don't have uniform meaning across architectures. So make use of
dma_max_pfn() which is expected to return the DMAable maximum pfn
value across architectures.

Cc: Chris Ball <cjb@laptop.org>
Signed-off-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 7d35496d
...@@ -15,6 +15,7 @@ ...@@ -15,6 +15,7 @@
#include <linux/freezer.h> #include <linux/freezer.h>
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/scatterlist.h> #include <linux/scatterlist.h>
#include <linux/dma-mapping.h>
#include <linux/mmc/card.h> #include <linux/mmc/card.h>
#include <linux/mmc/host.h> #include <linux/mmc/host.h>
...@@ -196,7 +197,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, ...@@ -196,7 +197,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card,
struct mmc_queue_req *mqrq_prev = &mq->mqrq[1]; struct mmc_queue_req *mqrq_prev = &mq->mqrq[1];
if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask) if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask)
limit = *mmc_dev(host)->dma_mask; limit = dma_max_pfn(mmc_dev(host)) << PAGE_SHIFT;
mq->card = card; mq->card = card;
mq->queue = blk_init_queue(mmc_request_fn, lock); mq->queue = blk_init_queue(mmc_request_fn, lock);
......
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