Commit 63624d13 authored by Yoshihiro Shimoda's avatar Yoshihiro Shimoda Committed by Ulf Hansson
Browse files

mmc: tmio: Use dma_max_mapping_size() instead of a workaround

Since the commit 133d624b

 ("dma: Introduce dma_max_mapping_size()")
provides a helper function to get the max mapping size, we can use
the function instead of the workaround code for swiotlb.

Signed-off-by: default avatarYoshihiro Shimoda <>
Acked-by: default avatarWolfram Sang <>
Reviewed-by: default avatarChristoph Hellwig <>
Reviewed-by: default avatarGeert Uytterhoeven <>
Reviewed-by: default avatarSimon Horman <>
Signed-off-by: default avatarUlf Hansson <>
parent 4aaaf3ab
......@@ -26,6 +26,7 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/highmem.h>
#include <linux/interrupt.h>
#include <linux/io.h>
......@@ -45,7 +46,6 @@
#include <linux/scatterlist.h>
#include <linux/sizes.h>
#include <linux/spinlock.h>
#include <linux/swiotlb.h>
#include <linux/workqueue.h>
#include "tmio_mmc.h"
......@@ -1199,19 +1199,9 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host)
mmc->max_blk_size = TMIO_MAX_BLK_SIZE;
mmc->max_blk_count = pdata->max_blk_count ? :
(PAGE_SIZE / mmc->max_blk_size) * mmc->max_segs;
mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count;
* Since swiotlb has memory size limitation, this will calculate
* the maximum size locally (because we don't have any APIs for it now)
* and check the current max_req_size. And then, this will update
* the max_req_size if needed as a workaround.
if (swiotlb_max_segment()) {
unsigned int max_size = (1 << IO_TLB_SHIFT) * IO_TLB_SEGSIZE;
if (mmc->max_req_size > max_size)
mmc->max_req_size = max_size;
mmc->max_req_size = min_t(size_t,
mmc->max_blk_size * mmc->max_blk_count,
mmc->max_seg_size = mmc->max_req_size;
if (mmc_can_gpio_ro(mmc))
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