dmaengine: fix enable for high order unmap pools

The higher order mempools support raid operations, and we want to
disable them when raid support is not enabled.  Making them conditional
on ASYNC_TX_DMA is not sufficient as other users (specifically dmatest)
will also issue raid operations.  Make raid drivers explicitly request
that the core carry the higher order pools.

Reported-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 446687c..132a4fd 100644 (file)
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -62,6 +62,7 @@ config INTEL_IOATDMA
        tristate "Intel I/OAT DMA support"
        depends on PCI && X86
        select DMA_ENGINE
+       select DMA_ENGINE_RAID
        select DCA
        help
          Enable support for the Intel(R) I/OAT DMA engine present
@@ -112,6 +113,7 @@ config MV_XOR
        bool "Marvell XOR engine support"
        depends on PLAT_ORION
        select DMA_ENGINE
+       select DMA_ENGINE_RAID
        select ASYNC_TX_ENABLE_CHANNEL_SWITCH
        ---help---
          Enable support for the Marvell XOR engine.
@@ -187,6 +189,7 @@ config AMCC_PPC440SPE_ADMA
        tristate "AMCC PPC440SPe ADMA support"
        depends on 440SPe || 440SP
        select DMA_ENGINE
+       select DMA_ENGINE_RAID
        select ARCH_HAS_ASYNC_TX_FIND_CHANNEL
        select ASYNC_TX_ENABLE_CHANNEL_SWITCH
        help
@@ -377,4 +380,7 @@ config DMATEST
          Simple DMA test client. Say N unless you're debugging a
          DMA Device driver.
 
+config DMA_ENGINE_RAID
+       bool
+
 endif

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index ea806bd..b601024 100644 (file)
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -912,7 +912,7 @@ struct dmaengine_unmap_pool {
 #define __UNMAP_POOL(x) { .size = x, .name = "dmaengine-unmap-" __stringify(x) }
 static struct dmaengine_unmap_pool unmap_pool[] = {
        __UNMAP_POOL(2),
-       #if IS_ENABLED(CONFIG_ASYNC_TX_DMA)
+       #if IS_ENABLED(CONFIG_DMA_ENGINE_RAID)
        __UNMAP_POOL(16),
        __UNMAP_POOL(128),
        __UNMAP_POOL(256),