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Fix uses of dma_max_pfn() when converting to a limiting address

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We must use a 64-bit for this, otherwise overflowed bits get lost, and
that can result in a lower than intended value set.

Fixes: 8e0cb8a1f6 ("ARM: 7797/1: mmc: Use dma_max_pfn(dev) helper for bounce_limit calculations")
Fixes: 7d35496dd9 ("ARM: 7796/1: scsi: Use dma_max_pfn(dev) helper for bounce_limit calculations")
Tested-Acked-by: Santosh Shilimkar <[email protected]>
Reviewed-by: Ulf Hansson <[email protected]>
Signed-off-by: Russell King <[email protected]>
This commit is contained in:
Russell King 2014-02-11 17:11:04 +00:00
commit e83b366487
2 changed files with 2 additions and 2 deletions
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2
drivers/scsi/scsi_lib.c
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@ -1684,7 +1684,7 @@ u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
host_dev = scsi_get_device(shost);
if (host_dev && host_dev->dma_mask)
bounce_limit = dma_max_pfn(host_dev) << PAGE_SHIFT;
bounce_limit = (u64)dma_max_pfn(host_dev) << PAGE_SHIFT;
return bounce_limit;
}