From: Christoph Hellwig <hch@lst.de>
To: "David S. Miller" <davem@davemloft.net>, Helge Deller <deller@gmx.de>
Cc: Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux-foundation.org, sparclinux@vger.kernel.org,
linux-parisc@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/5] ccio: allow large DMA masks
Date: Fri, 15 Feb 2019 15:45:55 +0100 [thread overview]
Message-ID: <20190215144559.8777-2-hch@lst.de> (raw)
In-Reply-To: <20190215144559.8777-1-hch@lst.de>
There is no harm in setting a 64-bit mask even if we don't need it,
and the current ccio code is one of the few place in the kernel
still rejecting larger than required DMA masks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/parisc/ccio-dma.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/parisc/ccio-dma.c b/drivers/parisc/ccio-dma.c
index 8d2fc84119c6..24a68fb7b2f9 100644
--- a/drivers/parisc/ccio-dma.c
+++ b/drivers/parisc/ccio-dma.c
@@ -710,8 +710,8 @@ ccio_dma_supported(struct device *dev, u64 mask)
return 0;
}
- /* only support 32-bit devices (ie PCI/GSC) */
- return (int)(mask == 0xffffffffUL);
+ /* only support 32-bit or better devices (ie PCI/GSC) */
+ return (int)(mask >= 0xffffffffUL);
}
/**
--
2.20.1
next prev parent reply other threads:[~2019-02-15 14:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 14:45 allow larger than require DMA masks Christoph Hellwig
2019-02-15 14:45 ` Christoph Hellwig [this message]
2019-02-15 14:45 ` [PATCH 2/5] sparc64: refactor the ali DMA quirk Christoph Hellwig
2019-02-15 18:34 ` David Miller
2019-02-15 14:45 ` [PATCH 3/5] sparc64/iommu: allow large DMA masks Christoph Hellwig
2019-02-15 18:34 ` David Miller
2019-02-15 14:45 ` [PATCH 4/5] sparc64/pci_sun4v: " Christoph Hellwig
2019-02-15 18:35 ` David Miller
2019-02-15 14:45 ` [PATCH 5/5] Documentation/DMA-API-HOWTO: update dma_mask sections Christoph Hellwig
2019-02-18 1:26 ` Yang, Shunyong
2019-09-23 21:14 ` allow larger than require DMA masks Sven Schnelle
2019-09-24 0:59 ` James Bottomley
2019-09-24 21:25 ` Christoph Hellwig
2019-09-24 21:59 ` James Bottomley
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