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authorBjorn Helgaas <bhelgaas@google.com>2014-05-20 16:54:23 -0600
committerBjorn Helgaas <bhelgaas@google.com>2014-05-20 16:55:39 -0600
commitace4b3fd67e771951d495aa1f1b1000984083362 (patch)
tree6af143970c659a6755795c1f4a499b4d014c030a /Documentation/DMA-API-HOWTO.txt
parent88a984ba0795f14a3847edbd7fabe652289ea89b (diff)
sh/PCI: Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory()
dma_declare_coherent_memory() needs both the CPU physical address and the bus address of the device memory. They are the same on this platform, but in general we should use pcibios_resource_to_bus() to account for any address translation done by the PCI host bridge. This makes no difference on Dreamcast, but is safer if the usage is copied to future drivers. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Arnd Bergmann <arnd@arndb.de> CC: Magnus Damm <damm@opensource.se> CC: linux-sh@vger.kernel.org
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