linux-kernel - [PATCH 3.16 074/125] powerpc/powernv: Update dev->dma_mask in pci_set_dma

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Message-Id: <20140903220625.897009613@linuxfoundation.org>
Date:	Wed,  3 Sep 2014 15:07:11 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, "Brian W. Hart" <hartb@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH 3.16 074/125] powerpc/powernv: Update dev->dma_mask in pci_set_dma_mask() path

3.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Brian W Hart <hartb@...ux.vnet.ibm.com>

commit a32305bf90a2ae0e6a9a93370c7616565f75e15a upstream.

powerpc defines various machine-specific routines for handling
pci_set_dma_mask().  The routines for machine "PowerNV" may neglect
to set dev->dma_mask.  This could confuse anyone (e.g. drivers) that
consult dev->dma_mask to find the current mask.  Set the dma_mask in
the PowerNV leaf routine.

Signed-off-by: Brian W. Hart <hartb@...ux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/powerpc/platforms/powernv/pci-ioda.c |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -491,6 +491,7 @@ static int pnv_pci_ioda_dma_set_mask(str
 		set_dma_ops(&pdev->dev, &dma_iommu_ops);
 		set_iommu_table_base(&pdev->dev, &pe->tce32_table);
 	}
+	*pdev->dev.dma_mask = dma_mask;
 	return 0;
 }

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