From 03127c58b93d7da5edb53118bdafabdcae3581ef Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Thu, 15 Aug 2019 09:27:02 +0200
Subject: drm/radeon: simplify and cleanup setting the dma mask
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Git-commit: 03127c58b93d7da5edb53118bdafabdcae3581ef
Patch-mainline: v5.4-rc1
References: bsc#1152489

Use dma_set_mask_and_coherent to set both masks in one go, and remove
the no longer required fallback, as the kernel now always accepts
larger than required DMA masks.  Fail the driver probe if we can't
set the DMA mask, as that means the system can only support a larger
mask.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/radeon/radeon_device.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index b8cc05826667..88eb7cb522bb 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -1382,15 +1382,10 @@ int radeon_device_init(struct radeon_device *rdev,
 		dma_bits = 32;
 #endif
 
-	r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
+	r = dma_set_mask_and_coherent(&rdev->pdev->dev, DMA_BIT_MASK(dma_bits));
 	if (r) {
-		dma_bits = 32;
 		pr_warn("radeon: No suitable DMA available\n");
-	}
-	r = pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
-	if (r) {
-		pci_set_consistent_dma_mask(rdev->pdev, DMA_BIT_MASK(32));
-		pr_warn("radeon: No coherent DMA available\n");
+		return r;
 	}
 	rdev->need_swiotlb = drm_need_swiotlb(dma_bits);
 
-- 
2.28.0