[PATCH] parisc: remove 32-bit DMA enforcement from sba_iommu

[Sven Schnelle <svens@stackframe.org>]

This breaks booting from sata_sil24 with the recent DMA
change. According to James Bottomley this was in to improve
performance. Remove it for now to make DMA working again.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
---
 drivers/parisc/sba_iommu.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/parisc/sba_iommu.c b/drivers/parisc/sba_iommu.c
index 296668caf7e5..6ac9500f2752 100644
--- a/drivers/parisc/sba_iommu.c
+++ b/drivers/parisc/sba_iommu.c
@@ -678,14 +678,6 @@ static int sba_dma_supported( struct device *dev, u64 mask)
 		return(0);
 	}
 
-	/* Documentation/DMA-API-HOWTO.txt tells drivers to try 64-bit
-	 * first, then fall back to 32-bit if that fails.
-	 * We are just "encouraging" 32-bit DMA masks here since we can
-	 * never allow IOMMU bypass unless we add special support for ZX1.
-	 */
-	if (mask > ~0U)
-		return 0;
-
 	ioc = GET_IOC(dev);
 	if (!ioc)
 		return 0;
-- 
2.23.0.rc1