From fbce251baa6e357441961c78796e5e9fad682675 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 13 Feb 2019 08:01:03 +0100
Subject: [PATCH] dma-direct: we might need GFP_DMA for 32-bit dma masks

If there is no ZONE_DMA32 we might need GFP_DMA to be able to
allocate memory that satisfies a 32-bit DMA mask.

Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 kernel/dma/direct.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index 355d16acee6d..d5bb51cf27c6 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -132,8 +132,7 @@ again:
 			goto again;
 		}
 
-		if (IS_ENABLED(CONFIG_ZONE_DMA) &&
-		    phys_mask < DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) {
+		if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) {
 			gfp = (gfp & ~GFP_DMA32) | GFP_DMA;
 			goto again;
 		}