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mmc: bcm2835-sdhost Observe SWIOTLB memory limit
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Make sure the sdhost driver doesn't use requests bigger than SWIOTLB
can handle.

Copied from [1].

Link: #6589
Signed-off-by: Phil Elwell <[email protected]>
[1] d4dd9bc ("mmc: bcm2835: Take SWIOTLB memory size limitation
into account")
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pelwell committed Jan 14, 2025
1 parent c807724 commit 21861b6
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion drivers/mmc/host/bcm2835-sdhost.c
Original file line number Diff line number Diff line change
Expand Up @@ -1971,7 +1971,7 @@ static int bcm2835_sdhost_add_host(struct platform_device *pdev)
}

mmc->max_segs = 128;
mmc->max_req_size = 524288;
mmc->max_req_size = min_t(size_t, 524288, dma_max_mapping_size(&pdev->dev));
mmc->max_seg_size = mmc->max_req_size;
mmc->max_blk_size = 512;
mmc->max_blk_count = 65535;
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