drivers/dma: remove unused support for MEMSET operations

There have never been any real users of MEMSET operations since they
have been introduced in January 2007 by commit 7405f74badf4 ("dmaengine:
refactor dmaengine around dma_async_tx_descriptor").  Therefore remove
support for them for now, it can be always brought back when needed.

[sebastian.hesselbarth@gmail.com: fix drivers/dma/mv_xor]
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Vinod Koul <vinod.koul@intel.com>
Acked-by: Dan Williams <djbw@fb.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Olof Johansson <olof@lixom.net>
Cc: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 0 insertions, 15 deletions

diff --git a/arch/arm/mach-iop13xx/setup.c b/arch/arm/mach-iop13xx/setup.c
index 3181f61ea63e..1c5bd7637b05 100644
--- a/arch/arm/mach-iop13xx/setup.c
+++ b/arch/arm/mach-iop13xx/setup.c
@@ -469,7 +469,6 @@ void __init iop13xx_platform_init(void)
                         dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
-                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
                         dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
                         break;
                 case IOP13XX_INIT_ADMA_1:
@@ -479,7 +478,6 @@ void __init iop13xx_platform_init(void)
                         dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
-                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
                         dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
                         break;
                 case IOP13XX_INIT_ADMA_2:
@@ -489,7 +487,6 @@ void __init iop13xx_platform_init(void)
                         dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR, plat_data->cap_mask);
                         dma_cap_set(DMA_XOR_VAL, plat_data->cap_mask);
-                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
                         dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
                         dma_cap_set(DMA_PQ, plat_data->cap_mask);
                         dma_cap_set(DMA_PQ_VAL, plat_data->cap_mask);
diff --git a/arch/arm/plat-iop/adma.c b/arch/arm/plat-iop/adma.c
index 1ff6a37e893c..a4d1f8de3b5b 100644
--- a/arch/arm/plat-iop/adma.c
+++ b/arch/arm/plat-iop/adma.c
@@ -192,12 +192,10 @@ static int __init iop3xx_adma_cap_init(void)
 
         #ifdef CONFIG_ARCH_IOP32X /* the 32x AAU does not perform zero sum */
         dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
-        dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
         dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
         #else
         dma_cap_set(DMA_XOR, iop3xx_aau_data.cap_mask);
         dma_cap_set(DMA_XOR_VAL, iop3xx_aau_data.cap_mask);
-        dma_cap_set(DMA_MEMSET, iop3xx_aau_data.cap_mask);
         dma_cap_set(DMA_INTERRUPT, iop3xx_aau_data.cap_mask);
         #endif
 
diff --git a/arch/arm/plat-orion/common.c b/arch/arm/plat-orion/common.c
index c019b7aaf776..c66d163d7a2a 100644
--- a/arch/arm/plat-orion/common.c
+++ b/arch/arm/plat-orion/common.c
@@ -666,14 +666,9 @@ void __init orion_xor0_init(unsigned long mapbase_low,
         orion_xor0_shared_resources[3].start = irq_1;
         orion_xor0_shared_resources[3].end = irq_1;
 
-        /*
-         * two engines can't do memset simultaneously, this limitation
-         * satisfied by removing memset support from one of the engines.
-         */
         dma_cap_set(DMA_MEMCPY, orion_xor0_channels_data[0].cap_mask);
         dma_cap_set(DMA_XOR, orion_xor0_channels_data[0].cap_mask);
 
-        dma_cap_set(DMA_MEMSET, orion_xor0_channels_data[1].cap_mask);
         dma_cap_set(DMA_MEMCPY, orion_xor0_channels_data[1].cap_mask);
         dma_cap_set(DMA_XOR, orion_xor0_channels_data[1].cap_mask);
 
@@ -732,14 +727,9 @@ void __init orion_xor1_init(unsigned long mapbase_low,
         orion_xor1_shared_resources[3].start = irq_1;
         orion_xor1_shared_resources[3].end = irq_1;
 
-        /*
-         * two engines can't do memset simultaneously, this limitation
-         * satisfied by removing memset support from one of the engines.
-         */
         dma_cap_set(DMA_MEMCPY, orion_xor1_channels_data[0].cap_mask);
         dma_cap_set(DMA_XOR, orion_xor1_channels_data[0].cap_mask);
 
-        dma_cap_set(DMA_MEMSET, orion_xor1_channels_data[1].cap_mask);
         dma_cap_set(DMA_MEMCPY, orion_xor1_channels_data[1].cap_mask);
         dma_cap_set(DMA_XOR, orion_xor1_channels_data[1].cap_mask);