dmaengine: remove arch dependency from DMADEVICES

The dependency is redundant since all drivers set their specific arch
dependencies.  The NET_DMA option is modified to be enabled only on platforms
where it is known to have a positive effect.  HAS_DMA is added as an explicit
dependency for the DMADEVICES menu.

Acked-by: Adrian Bunk <bunk@kernel.org>
Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6239c3df30ac53fd877e4779c721068568556e1d..e4dd0065da33e001de7ce80de980434b49d3758b 100644 (file)
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -4,13 +4,14 @@
 
 menuconfig DMADEVICES
        bool "DMA Engine support"
 
 menuconfig DMADEVICES
        bool "DMA Engine support"

-       depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX || PPC
-       depends on !HIGHMEM64G
+       depends on !HIGHMEM64G && HAS_DMA

        help
          DMA engines can do asynchronous data transfers without
          involving the host CPU.  Currently, this framework can be
          used to offload memory copies in the network stack and
        help
          DMA engines can do asynchronous data transfers without
          involving the host CPU.  Currently, this framework can be
          used to offload memory copies in the network stack and

-         RAID operations in the MD driver.
+         RAID operations in the MD driver.  This menu only presents
+         DMA Device drivers supported by the configured arch, it may
+         be empty in some cases.

 
 if DMADEVICES
 
 
 if DMADEVICES
 


@@ -55,10 +56,12 @@ comment "DMA Clients"
 config NET_DMA
        bool "Network: TCP receive copy offload"
        depends on DMA_ENGINE && NET
 config NET_DMA
        bool "Network: TCP receive copy offload"
        depends on DMA_ENGINE && NET

+       default (INTEL_IOATDMA || FSL_DMA)

        help
          This enables the use of DMA engines in the network stack to
          offload receive copy-to-user operations, freeing CPU cycles.
        help
          This enables the use of DMA engines in the network stack to
          offload receive copy-to-user operations, freeing CPU cycles.

-         Since this is the main user of the DMA engine, it should be enabled;
-         say Y here.
+
+         Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
+         say N.

 
 endif
 
 endif